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Kaufman KR, Miller EJ, Deml CM, Sheehan RC, Grabiner MD, Wyatt M, Zai CZ, Kingsbury T, Tullos ML, Acasio JC, Mahon CE, Hendershot BD, Dearth CL. Fall Prevention Training for Service Members With an Amputation or Limb Salvage Following Lower Extremity Trauma. Mil Med 2024; 189:980-987. [PMID: 36794799 DOI: 10.1093/milmed/usad005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/02/2022] [Accepted: 01/10/2023] [Indexed: 02/17/2023] Open
Abstract
INTRODUCTION Recent military conflicts have resulted in a significant number of lower extremity injuries to U.S. service members that result in amputation or limb preservation (LP) procedures. Service members receiving these procedures report a high prevalence and deleterious consequences of falls. Very little research exists to improve balance and reduce falls, especially among young active populations such as service members with LP or limb loss. To address this research gap, we evaluated the success of a fall prevention training program for service members with lower extremity trauma by (1) measuring fall rates, (2) quantifying improvements in trunk control, and (3) determining skill retention at 3 and 6 months after training. MATERIALS AND METHODS Forty-five participants (40 males, mean [±SD] age, 34 ± 8 years) with lower extremity trauma (20 with unilateral transtibial amputation, 6 with unilateral transfemoral amputation, 5 with bilateral transtibial amputation, and 14 with unilateral LP procedures) were enrolled. A microprocessor-controlled treadmill was used to produce task-specific postural perturbations which simulated a trip. The training was conducted over a 2-week period and consisted of six 30-minute sessions. The task difficulty was increased as the participant's ability progressed. The effectiveness of the training program was assessed by collecting data before training (baseline; repeated twice), immediately after training (0 month), and at 3 and 6 months post-training. Training effectiveness was quantified by participant-reported falls in the free-living environment before and after training. Perturbation-induced recovery step trunk flexion angle and velocity was also collected. RESULTS Participants reported reduced falls and improved balance confidence in the free-living environment following the training. Repeated testing before training revealed that there were no pre-training differences in trunk control. The training program improved trunk control following training, and these skills were retained at 3 and 6 months after training. CONCLUSION This study showed that task-specific fall prevention training reduced falls across a cohort of service members with diverse types of amputations and LP procedures following lower extremity trauma. Importantly, the clinical outcome of this effort (i.e., reduced falls and improved balance confidence) can lead to increased participation in occupational, recreational, and social activities and thus improved quality of life.
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Affiliation(s)
- Kenton R Kaufman
- Mayo Clinic, Motion Analysis Laboratory, Rochester, MN 55905, USA
| | - Emily J Miller
- Mayo Clinic, Motion Analysis Laboratory, Rochester, MN 55905, USA
| | - Christine M Deml
- Mayo Clinic, Motion Analysis Laboratory, Rochester, MN 55905, USA
| | - Riley C Sheehan
- Department of Rehabilitation Medicine, Center for the Intrepid-Brooke Army Medical Center, San Antonio, TX 78219, USA
- Department of Kinesiology and Nutrition/Bioengineering, University of Illinois-Chicago, Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
- Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | | | - Marilynn Wyatt
- Naval Medical Center San Diego, Motion Analysis Laboratory, San Diego, CA 92134, USA
| | - Claire Z Zai
- Naval Medical Center San Diego, Motion Analysis Laboratory, San Diego, CA 92134, USA
| | - Trevor Kingsbury
- Naval Medical Center San Diego, Motion Analysis Laboratory, San Diego, CA 92134, USA
| | - Meghan L Tullos
- Department of Kinesiology and Nutrition/Bioengineering, University of Illinois-Chicago, Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
| | - Julian C Acasio
- Department of Kinesiology and Nutrition/Bioengineering, University of Illinois-Chicago, Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
| | - Caitlin E Mahon
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Joint Base San Antonio Fort Sam Houston, TX 78234, USA
| | - Brad D Hendershot
- Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Joint Base San Antonio Fort Sam Houston, TX 78234, USA
| | - Christopher L Dearth
- Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Department of Rehabilitation, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA
- DoD-VA Extremity Trauma and Amputation Center of Excellence, Joint Base San Antonio Fort Sam Houston, TX 78234, USA
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Shin S, Simpkins C, Ahn J, Yang F. Impact of standing perturbation intensities on fall and stability outcomes in healthy young adults. J Biomech 2024; 168:112123. [PMID: 38696984 DOI: 10.1016/j.jbiomech.2024.112123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 03/14/2024] [Accepted: 04/24/2024] [Indexed: 05/04/2024]
Abstract
Motorized treadmills have been extensively used in investigating reactive balance control and developing perturbation-based interventions for fall prevention. However, the relationship between perturbation intensity and its outcome has not been quantified. The primary purpose of this study was to quantitatively analyze how the treadmill belt's peak velocity affects the perturbation outcome and other metrics related to the reactive balance in young adults while the total belt displacement is controlled at 0.36 m. Thirty-one healthy young adults were randomly assigned into three groups with different peak belt speeds: low (0.9 m/s), medium (1.2 m/s), and high (1.8 m/s). Protected by a safety harness, participants were exposed to a forward support surface translation while standing at an unexpected timing on an ActiveStep treadmill. The primary (perturbation outcome: fall vs. recovery) and secondary (dynamic stability, hip descent, belt distance at liftoff, and recovery step latency) outcome measures were compared among groups. Results revealed that a higher perturbation intensity is correlated with a greater faller rate (p < 0.001). Compared to the low- and medium-intensity groups, the high-intensity group was less stable (p < 0.001) with a larger hip descent (p < 0.001) and a longer belt distance (p < 0.001) at the recovery step liftoff. The results suggest that the increased perturbation intensity raises the risk of falling with larger instability and poorer reactive performance after a support surface translation-induced perturbation in healthy young adults. The findings could furnish preliminary guidance for us to design and select the optimal perturbation intensity that can maximize the effects of perturbation-based training protocols.
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Affiliation(s)
- Sangwon Shin
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE 68182, USA
| | - Caroline Simpkins
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA 30303, USA
| | - Jiyun Ahn
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA 30303, USA
| | - Feng Yang
- Department of Kinesiology and Health, Georgia State University, Atlanta, GA 30303, USA.
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Kim T, Yu X, Xiong S. A multifactorial fall risk assessment system for older people utilizing a low-cost, markerless Microsoft Kinect. ERGONOMICS 2024; 67:50-68. [PMID: 37079340 DOI: 10.1080/00140139.2023.2202845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 03/29/2023] [Indexed: 05/03/2023]
Abstract
Falls among older people are a major health concern. This study aims to develop a multifactorial fall risk assessment system for older people using a low-cost, markerless Microsoft Kinect. A Kinect-based test battery was designed to comprehensively assess major fall risk factors. A follow-up experiment was conducted with 102 older participants to assess their fall risks. Participants were divided into high and low fall risk groups based on their prospective falls over a 6-month period. Results showed that the high fall risk group performed significantly worse on the Kinect-based test battery. The developed random forest classification model achieved an average classification accuracy of 84.7%. In addition, the individual's performance was computed as the percentile value of a normative database to visualise deficiencies and targets for intervention. These findings indicate that the developed system can not only screen out 'at risk' older individuals with good accuracy, but also identify potential fall risk factors for effective fall intervention.Practitioner summary: Falls are the leading cause of injuries in older people. We newly developed a multifactorial fall risk assessment system for older people utilising a low-cost, markerless Kinect. Results showed that the developed system can screen out 'at risk' individuals and identify potential risk factors for effective fall intervention.
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Affiliation(s)
- Taekyoung Kim
- Human Factors and Ergonomics Laboratory, Department of Industrial and Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejoen, Republic of Korea
- KT R&D Center, Seoul, Republic of Korea
| | - Xiaoqun Yu
- Human Factors and Ergonomics Laboratory, Department of Industrial and Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejoen, Republic of Korea
| | - Shuping Xiong
- Human Factors and Ergonomics Laboratory, Department of Industrial and Systems Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejoen, Republic of Korea
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Hezel N, Sloot LH, Wanner P, Becker C, Bauer JM, Steib S, Werner C. Feasibility, effectiveness and acceptability of two perturbation-based treadmill training protocols to improve reactive balance in fall-prone older adults (FEATURE): protocol for a pilot randomised controlled trial. BMJ Open 2023; 13:e073135. [PMID: 37666555 PMCID: PMC10481747 DOI: 10.1136/bmjopen-2023-073135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 08/14/2023] [Indexed: 09/06/2023] Open
Abstract
INTRODUCTION Perturbation-based balance training (PBT) targets the mechanism of falls (eg, slipping, tripping) to specifically train the recovery actions needed to avoid a fall. This task-specific training has shown great promise as an effective and efficient intervention for fall prevention in older adults. However, knowledge about the dose-response relationship of PBT, as well as its feasibility and acceptability in older adults with increased risk of falling is still limited. Thus, the aim of this study is to compare the effectiveness of two different treadmill PBT protocols for improving reactive balance control in fall-prone older adults, and to evaluate the feasibility and acceptability of these protocols. METHODS AND ANALYSIS The study is designed as a pilot randomised controlled trial with a 6-week intervention and 6-week follow-up period. Thirty-six community-dwelling, fall-prone (Timed Up and Go >12 s, habitual gait speed <1.0 m/s and/or fall history) older adults will be randomised (1:1) to receive six (weeks 1-6) or two treadmill PBT sessions (weeks 1+6) plus four conventional treadmill training sessions (weeks 2-5). Training sessions are conducted 1×/week for 30 min. Each PBT will include 40 perturbations in anterior-posterior and mediolateral directions. Reactive balance after perturbations in standing (Stepping Threshold Test (STT)) and walking (Dynamic Stepping Threshold Test (DSTT)) will be assessed as the primary outcome for effectiveness. Secondary outcomes are spatiotemporal and kinematic parameters collected during STT, DSTT and PBT, maximum perturbation magnitude for each PBT session, static and dynamic balance, physical capacity, physical activity, concerns with falling and executive functions. Feasibility will be assessed via training adherence, drop-out rate, perturbations actually performed and adverse events; and acceptability via self-designed questionnaire and focus groups. ETHICS AND DISSEMINATION The study has been approved by the Ethics Committee of the Medical Faculty Heidelberg (S-602/2022). Findings will be disseminated through publications in peer-reviewed journals and conference presentations. TRIAL REGISTRATION NUMBER DRKS00030805.
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Affiliation(s)
- Natalie Hezel
- Geriatric Center, Heidelberg University Hospital, Heidelberg, Germany
| | - Lizeth H Sloot
- Institute of Computer Engineering, Heidelberg University, Heidelberg, Germany
| | - Philipp Wanner
- Institute for Sports and Sports Science, Heidelberg University, Heidelberg, Germany
| | - Clemens Becker
- Unit of Digital Geriatric Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Jürgen M Bauer
- Geriatric Center, Heidelberg University Hospital, Heidelberg, Germany
| | - Simon Steib
- Institute for Sports and Sports Science, Heidelberg University, Heidelberg, Germany
| | - Christian Werner
- Geriatric Center, Heidelberg University Hospital, Heidelberg, Germany
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Brüll L, Hezel N, Arampatzis A, Schwenk M. Comparing the Effects of Two Perturbation-Based Balance Training Paradigms in Fall-Prone Older Adults: A Randomized Controlled Trial. Gerontology 2023; 69:910-922. [PMID: 36921581 DOI: 10.1159/000530167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/08/2023] [Indexed: 03/17/2023] Open
Abstract
INTRODUCTION There is increasing evidence that perturbation-based balance training (PBT) is highly effective in preventing falls at older age. Different PBT paradigms have been presented so far, yet a systematic comparison of PBT approaches with respect to feasibility and effectiveness is missing. Two different paradigms of PBT seem to be promising for clinical implementation: (1) technology-supported training on a perturbation treadmill (PBTtreadmill); (2) training of dynamic stability mechanisms in the presence of perturbations induced by unstable surfaces (PBTstability). This study aimed to compare both program's feasibility and effectiveness in fall-prone older adults. METHODS In this three-armed randomized controlled trial, seventy-one older adults (74.9 ± 6.0 years) with a verified fall risk were randomly assigned into three groups: PBTtreadmill on a motorized treadmill, PBTstability using unstable conditions such as balance pads, and a passive control group (CG). In both intervention groups, participants conducted a 6-week intervention with 3 sessions per week. Effects were assessed in fall risk (Brief-BEST), balance ability (Stepping Threshold Test, center of pressure, limits of stability), leg strength capacity, functional performance (Timed Up and Go Test, Chair-Stand), gait (preferred walking speed), and fear of falling (Short FES-I). RESULTS Fifty-one participants completed the study. Training adherence was 91% for PBTtreadmill and 87% for PBTstability, while no severe adverse events occurred. An analysis of covariance with an intention-to-treat approach revealed statistically significant group effects in favor of PBTstability in the Brief-BEST (p = 0.009, η2 = 0.131) and the limits of stability (p = 0.020, η2 = 0.110) and in favor of PBTtreadmill in the Stepping Threshold Test (p < 0.001, η2 = 0.395). The other outcomes demonstrated no significant group effects. CONCLUSION Both training paradigms demonstrated high feasibility and were effective in improving specific motor performances in the fall-prone population and these effects were task specific. PBTtreadmill showed higher improvements in reactive balance, which might have been promoted by the unpredictable nature of the included perturbations and the similarity to the tested surface perturbation paradigm. PBTstability showed more wide-ranging effects on balance ability. Consequently, both paradigms improved fall risk-associated measures. The advantages of both formats should be evaluated in light of individual needs and preferences. Larger studies are needed to investigate the effects of these paradigms on real-life fall rates.
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Affiliation(s)
- Leon Brüll
- Network Aging Research, Heidelberg University, Heidelberg, Germany,
- Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Berlin, Germany,
- Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany,
| | - Natalie Hezel
- Network Aging Research, Heidelberg University, Heidelberg, Germany
- Geriatric Center, Heidelberg University Hospital, Agaplesion Bethanien Hospital Heidelberg, Heidelberg, Germany
| | - Adamantios Arampatzis
- Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
- Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Michael Schwenk
- Network Aging Research, Heidelberg University, Heidelberg, Germany
- Institute of Sports and Sports Sciences, Heidelberg University, Heidelberg, Germany
- Department of Sport Science, Human Performance Research Center, University of Konstanz, Konstanz, Germany
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Shih HT, Gregor R, Lee SP. Description, reliability and utility of a ground-reaction-force triggered protocol for precise delivery of unilateral trip-like perturbations during gait. PLoS One 2023; 18:e0284384. [PMID: 37098086 PMCID: PMC10128926 DOI: 10.1371/journal.pone.0284384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/24/2023] [Indexed: 04/26/2023] Open
Abstract
Tripping is a common cause of falls and a focus of many biomechanical investigations. Concerns regarding the precision of delivery of simulated-fall protocols reside in the current biomechanical methodology literature. This study aimed to develop a treadmill-based protocol that generated unanticipated trip-like perturbations during walking with high timing precision. The protocol utilized a side-by-side split-belt instrumented treadmill. Programmed treadmill belt acceleration profiles (two levels of perturbation magnitude) were triggered unilaterally at the instant the tripped leg bore 20% of the body weight. Test-retest reliability of fall responses was examined in 10 participants. Utility was examined as to whether the protocol could differentiate the fall recovery responses and likelihood of falls, estimated using peak trunk flexion angle after perturbation, between young and middle-aged adults (n = 10 per group). Results showed that the perturbations could be precisely and consistently delivered during early stance phases (10-45 milliseconds after initial contact). The protocol elicited excellent reliability of responses in both perturbation magnitudes (ICC = 0.944 and 0.911). Middle-aged adults exhibited significantly greater peak trunk flexion than young adults (p = 0.035), indicating that the current protocol can be utilized in differentiating individuals with different levels of fall risks. The main limitation of the protocol is that perturbations are delivered in stance rather swing phase. This protocol addressed some issues discussed in previous "simulated fall" protocols and may be useful for future fall research and subsequent clinical interventions.
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Affiliation(s)
- Hui-Ting Shih
- Department of Physical Therapy, University of Nevada Las Vegas, Las Vegas, Nevada, United States of America
- Baylor Scott & White Research Institute, Dallas, Texas, United States of America
| | - Robert Gregor
- School of Integrated Health Sciences, University of Nevada Las Vegas, Las Vegas, Nevada, United States of America
| | - Szu-Ping Lee
- Department of Physical Therapy, University of Nevada Las Vegas, Las Vegas, Nevada, United States of America
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Devasahayam AJ, Farwell K, Lim B, Morton A, Fleming N, Jagroop D, Aryan R, Saumur TM, Mansfield A. The Effect of Reactive Balance Training on Falls in Daily Life: An Updated Systematic Review and Meta-Analysis. Phys Ther 2022; 103:pzac154. [PMID: 37651698 DOI: 10.1093/ptj/pzac154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/11/2022] [Accepted: 08/19/2022] [Indexed: 09/02/2023]
Abstract
OBJECTIVE Reactive balance training (RBT) is an emerging approach to reducing falls risk in people with balance impairments. The purpose of this study was to determine the effect of RBT on falls in daily life among individuals at increased risk of falls and to document associated adverse events. METHODS Databases searched were Ovid MEDLINE (1946 to March 2022), Embase Classic and Embase (1947 to March 2022), Cochrane Central Register of Controlled Trials (2014 to March 2022), and Physiotherapy Evidence Database (PEDro; searched on 22 March 2022). Randomized controlled trials of RBT were included. The literature search was limited to the English language. Records were screened by 2 investigators separately. Outcome measures were number of participants who reported falls after training, number of falls reported after training, and the nature, frequency, and severity of adverse events. Authors of included studies were contacted to obtain additional information. RESULTS Twenty-nine trials were included, of which 17 reported falls and 21 monitored adverse events. Participants assigned to RBT groups were less likely to fall compared with control groups (fall risk ratio = 0.76; 95% CI = 0.63-0.92; I2 = 32%) and reported fewer falls than control groups (rate ratio = 0.61; 95% CI = 0.45-0.83; I2 = 81%). Prevalence of adverse events was higher in RBT (29%) compared with control groups (20%). CONCLUSION RBT reduced the likelihood of falls in daily life for older adults and people with balance impairments. More adverse events were reported in RBT than control groups. IMPACT Balance training that evokes balance reactions can reduce falls among people at increased risk of falls. Older adults and individuals with balance problems were less likely to fall in daily life after participating in RBT compared with traditional balance training. LAY SUMMARY If you are an older adult and/or have balance problems, your physical therapist may prescribe reactive balance training rather than traditional balance training in order to reduce your likelihood of falling in daily life.
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Affiliation(s)
| | - Kyle Farwell
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
| | - Bohyung Lim
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
| | - Abigail Morton
- Faculty of Health, University of Waterloo, Waterloo, Ontario, Canada
| | - Natalie Fleming
- École de Readaptation, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- École de Kinésiologie et de Loisir, Université de Moncton, Moncton, New Brunswick, Canada
| | - David Jagroop
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
| | - Raabeae Aryan
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
- Rehabilitation Sciences Institute, University of Toronto, Toronto, Ontario, Canada
| | - Tyler Mitchell Saumur
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
- Rehabilitation Sciences Institute, University of Toronto, Toronto, Ontario, Canada
- Evaluative Clinical Sciences, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Avril Mansfield
- KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
- Evaluative Clinical Sciences, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
- Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada
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Lee Y, Alexander NB, Madigan ML. A proposed methodology for trip recovery training without a specialized treadmill. Front Sports Act Living 2022; 4:1003813. [PMID: 36479551 PMCID: PMC9719936 DOI: 10.3389/fspor.2022.1003813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/07/2022] [Indexed: 11/22/2022] Open
Abstract
Falls are the leading cause of accidental injuries among adults aged 65 years and older. Perturbation-based balance training is a novel exercise-based fall prevention intervention that has shown promise in reducing falls. Trip recovery training is a form of perturbation-based balance training that targets trip-induced falls. Trip recovery training typically requires the use of a specialized treadmill, the cost of which may present a barrier for use in some settings. The goal of this paper is to present a methodology for trip recovery training that does not require a specialized treadmill. A trial is planned in the near future to evaluate its effectiveness. If effective, non-treadmill trip recovery training could provide a lower cost method of perturbation-based balance training, and facilitate greater implementation outside of the research environment.
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Affiliation(s)
- Youngjae Lee
- Grado Department of Industrial and Systems Engineering (0118), Virginia Tech, Blacksburg, VA, United States
| | - Neil B. Alexander
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
- Geriatric Research Education and Clinical Center, Veterans Affairs Ann Arbor Health Care System, Ann Arbor, MI, United States
| | - Michael L. Madigan
- Grado Department of Industrial and Systems Engineering (0118), Virginia Tech, Blacksburg, VA, United States
- Department of Biomedical Engineering and Mechanics (0298), Virginia Tech, Blacksburg, VA, United States
- *Correspondence: Michael L. Madigan
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McCrum C, Bhatt TS, Gerards MHG, Karamanidis K, Rogers MW, Lord SR, Okubo Y. Perturbation-based balance training: Principles, mechanisms and implementation in clinical practice. Front Sports Act Living 2022; 4:1015394. [PMID: 36275443 PMCID: PMC9583884 DOI: 10.3389/fspor.2022.1015394] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/20/2022] [Indexed: 02/05/2023] Open
Abstract
Since the mid-2000s, perturbation-based balance training has been gaining interest as an efficient and effective way to prevent falls in older adults. It has been suggested that this task-specific training approach may present a paradigm shift in fall prevention. In this review, we discuss key concepts and common issues and questions regarding perturbation-based balance training. In doing so, we aim to provide a comprehensive synthesis of the current evidence on the mechanisms, feasibility and efficacy of perturbation-based balance training for researchers and practitioners. We address this in two sections: "Principles and Mechanisms" and "Implementation in Practice." In the first section, definitions, task-specificity, adaptation and retention mechanisms and the dose-response relationship are discussed. In the second section, issues related to safety, anxiety, evidence in clinical populations (e.g., Parkinson's disease, stroke), technology and training devices are discussed. Perturbation-based balance training is a promising approach to fall prevention. However, several fundamental and applied aspects of the approach need to be further investigated before it can be widely implemented in clinical practice.
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Affiliation(s)
- Christopher McCrum
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, Netherlands
- Neuromotor Rehabilitation Research Group, Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
| | - Tanvi S. Bhatt
- Department of Physical Therapy, College of Applied Health Sciences, University of Illinois, Chicago, IL, United States
| | - Marissa H. G. Gerards
- Department of Epidemiology, Care and Public Health Institute (CAPHRI), Maastricht University, Maastricht, Netherlands
- Department of Physiotherapy, Maastricht University Medical Center (MUMC+), Maastricht, Netherlands
| | - Kiros Karamanidis
- Sport and Exercise Science Research Centre, School of Applied Sciences, London South Bank University, London, United Kingdom
| | - Mark W. Rogers
- Department of Physical Therapy and Rehabilitation Science, School of Medicine, University of Maryland, Baltimore, MD, United States
| | - Stephen R. Lord
- Falls, Balance and Injury Research Centre, Neuroscience Research Australia, Sydney, NSW, Australia
- Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
| | - Yoshiro Okubo
- Falls, Balance and Injury Research Centre, Neuroscience Research Australia, Sydney, NSW, Australia
- Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
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Adams M, Brüll L, Lohkamp M, Schwenk M. The Stepping Threshold Test for Reactive Balance: Validation of Two Observer-Based Evaluation Strategies to Assess Stepping Behavior in Fall-Prone Older Adults. Front Sports Act Living 2021; 3:715392. [PMID: 34708198 PMCID: PMC8542787 DOI: 10.3389/fspor.2021.715392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/02/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: Measurement of reactive balance is critical for fall prevention but is severely underrepresented in the clinical setting due to the lack of valid assessments. The Stepping Threshold Test (STT) is a newly developed instrumented test for reactive balance on a movable platform, however, it has not yet been validated for fall-prone older adults. Furthermore, different schemes of observer-based evaluation seem possible. The aim of this study was to investigate validity with respect to fall risk, interpretability, and feasibility of the STT using two different evaluation strategies. Methods: This study involved 71 fall-prone older adults (aged ≥ 65) who underwent progressively increasing perturbations in four directions for the STT. Single and multiple-step thresholds for each perturbation direction were determined via two observer-based evaluation schemes, which are the 1) consideration of all steps (all-step-count evaluation, ACE) and 2) consideration of those steps that extend the base of support in the direction of perturbation (direction-sensitive evaluation, DSE). Established balance measures including global (Brief Balance Evaluations Systems Test, BriefBEST), proactive (Timed Up and Go, TUG), and static balance (8-level balance scale, 8LBS), as well as fear of falling (Short Falls Efficacy Scale-International, FES-I) and fall occurrence in the past year, served as reference measurements. Results: The sum scores of STT correlated moderately with the BriefBEST (ACE: r = 0.413; DSE: r = 0.388) and TUG (ACE: r = -0.379; DSE: r = -0.435) and low with the 8LBS (ACE: r = 0.173; DSE: r = 0.246) and Short FES-I (ACE: r = -0.108; DSE: r = -0.104). The sum scores did not distinguish between fallers and non-fallers. No floor/ceiling effects occurred for the STT sum score, but these effects occurred for specific STT thresholds for both ACE (mean floor effect = 13.04%, SD = 19.35%; mean ceiling effect = 4.29%, SD = 7.75%) and DSE (mean floor effect = 7.86%, SD = 15.23%; mean ceiling effect = 21.07%, SD = 26.08). No severe adverse events occurred. Discussion: Correlations between the STT and other balance tests were in the expected magnitude, indicating convergent validity. However, the STT could not distinguish between fallers and non-fallers, referring to a need for further studies and prospective surveys of falls to validate the STT. Current results did not allow a definitive judgment on the advantage of using ACE or DSE. Study results represented a step toward a reactive balance assessment application in a clinical setting.
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Affiliation(s)
- Michael Adams
- Network Aging Research, Heidelberg University, Heidelberg, Germany.,School for Therapeutic Sciences, SRH University Heidelberg, Heidelberg, Germany
| | - Leon Brüll
- Network Aging Research, Heidelberg University, Heidelberg, Germany.,Department of Training and Movement Sciences, Humboldt-Universität zu Berlin, Berlin, Germany.,Berlin School of Movement Science, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Monika Lohkamp
- School for Therapeutic Sciences, SRH University Heidelberg, Heidelberg, Germany
| | - Michael Schwenk
- Network Aging Research, Heidelberg University, Heidelberg, Germany.,Institute of Sports and Sports Sciences, Heidelberg University, Heidelberg, Germany.,Department of Sport Science, Human Performance Research Center, University of Konstanz, Konstanz, Germany
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11
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Grabiner MD, Kaufman KR. Developing and Establishing Biomechanical Variables as Risk Biomarkers for Preventable Gait-Related Falls and Assessment of Intervention Effectiveness. Front Sports Act Living 2021; 3:722363. [PMID: 34632378 PMCID: PMC8492908 DOI: 10.3389/fspor.2021.722363] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/26/2021] [Indexed: 01/17/2023] Open
Abstract
The purpose of this review is to position the emerging clinical promise of validating and implementing biomechanical biomarkers of falls in fall prevention interventions. The review is framed in the desirability of blunting the effects of the rapidly growing population of older adults with regard to the number of falls, their related injuries, and health care costs. We propose that biomechanical risk biomarkers may be derived from systematic study of the responses to treadmill-delivered perturbations to both identify individuals with a risk of specific types of falls, such as trips and slips as well as quantifying the effectiveness of interventions designed to reduce that risk. The review follows the evidence derived using a specific public health approach and the published biomedical literature that supports trunk kinematics as a biomarker as having met many of the criteria for a biomarker for trip-specific falls. Whereas, the efficacy of perturbation training to reduce slip-related falls by older adults appears to have been confirmed, its effectiveness presently remains an open and important question. There is a dearth of data related to the efficacy and effectiveness of perturbation training to reduce falls to the side falls by older adults. At present, efforts to characterize the extent to which perturbation training can reduce falls and translate the approaches to the clinic represents an important research opportunity.
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Affiliation(s)
- Mark D Grabiner
- Biomechanics and Clinical Biomechanics Laboratory, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL, United States
| | - K R Kaufman
- Motion Analysis Laboratory, Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, United States
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12
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Nor R, Justine M, Joanny A, Zolkafli AA. Effectiveness of a 3-month antifalling program in the mobility, balance confidence, and muscle performance of older adults. J Exerc Rehabil 2021; 17:247-255. [PMID: 34527636 PMCID: PMC8413913 DOI: 10.12965/jer.2142412.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 07/28/2021] [Indexed: 11/22/2022] Open
Abstract
This study determined the effectiveness of a 3-month group-based multicomponent exercise program in the mobility, balance confidence, and muscle performance of older adults. A total of 40 participants (mean age=70.60±6.25 years completed pre- and posttest clinical intervention measures of mobility using the Timed Up and Go (TUG) test, balance confidence using the Activities-specific Balance Confidence scale, upper limb strength (handgrip dynamometer), and lower limb function (30-sec chair rise test). Data were analyzed using paired t-test and based on TUG criteria for risk of fall (low- and high-risk groups). Significant improvements were found in all measures (All P<0.05) following the 3-month program. Measures according to the risk of fall categories were also significantly improved (P<0.01), except the left handgrip strength (P>0.05). The low-risk group showed a higher improvement in mobility (14.87% vs. 11.74%), balance confidence (34.21% vs. 26.08%), and lower limb function (96.87% vs. 21.20%) but was not significantly different from the high-risk group (P>0.05). A group-based multicomponent exercise program benefited the physical functions of older adults at low- or high risk of falls.
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Affiliation(s)
- Rahim Nor
- Center for Physiotherapy Studies, Faculty of Health Sciences, Universiti Teknologi MARA Selangor, Puncak Alam Campus, Selangor,
Malaysia
- Klinik Kesihatan Cheras, Jalan Yaacob Latiff, Kuala Lumpur,
Malaysia
| | - Maria Justine
- Center for Physiotherapy Studies, Faculty of Health Sciences, Universiti Teknologi MARA Selangor, Puncak Alam Campus, Selangor,
Malaysia
| | - Angelbeth Joanny
- Center for Physiotherapy Studies, Faculty of Health Sciences, Universiti Teknologi MARA Selangor, Puncak Alam Campus, Selangor,
Malaysia
| | - Azrul Anuar Zolkafli
- Faculty of Sport Science and Coaching, Universiti Pendidikan Sultan Idris, Perak Darul Ridzuan,
Malaysia
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13
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Sever J, Babič J, Kozinc Ž, Šarabon N. Postural Responses to Sudden Horizontal Perturbations in Tai Chi Practitioners. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18052692. [PMID: 33800052 PMCID: PMC7967416 DOI: 10.3390/ijerph18052692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/03/2022]
Abstract
Tai Chi has been shown to elicit numerous positive effects on health and well-being. In this study, we examined reactive postural control after sudden unloading horizontal perturbations, which resembled situations encountered during Tai Chi. The study involved 20 participants, 10 in the Tai Chi group (age: 37.4 ± 7.8 years), who had been regularly training the push-hand technique for at least 7 years, and 10 in the control group, consisting of healthy adults (age: 28.8 ± 5.0). Perturbations were applied at three different positions (hips, shoulders, and arms) via the load-release paradigm. Twenty measurements were carried out for each perturbation position. We measured peak vertical and horizontal forces on the ground (expressed percentage of body mass (%BM)), peak center of pressure displacement and peak horizontal and vertical velocities at the knee, hip and shoulder joints. The Tai Chi group exhibited smaller increases in vertical ground reaction forces when perturbations were applied at the hips (11.5 ± 2.1 vs. 19.6 ± 5.5 %BW; p = 0.002) and the arms (14.1 ± 4.2 vs. 23.2 ± 8.4 %BW; p = 0.005). They also responded with higher horizontal force increase after hip perturbation (16.2 ± 3.2 vs. 13.1 ± 2.5 %BW; p < 0.001). Similar findings were found when observing various outcomes related to velocities of vertical movement. The Tai Chi group also showed lower speeds of backward movement of the knee (p = 0.005–0.009) after hip (0.49 ± 0.13 vs. 0.85 ± 0.14 m/s; p = 0.005) and arm perturbations (0.97 ± 0.18 vs. 1.71 ± 0.29 m/s; p = 0.005). Center of pressure displacements were similar between groups. Our study demonstrated that engaging in Tai Chi could be beneficial to reactive postural responses after sudden perturbations in a horizontal direction; however, future interventional studies are needed to directly confirm this. Moreover, because of the age difference between the groups, some confounding effects of age cannot be ruled out.
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Affiliation(s)
- Jernej Sever
- Center Premik, Ltd., Center for Psychophysical Development, 1000 Ljubljana, Slovenia;
| | - Jan Babič
- Laboratory for Neuromechanics and Biorobotics, Jožef Stefan Institute, 1000 Ljubljana, Slovenia;
| | - Žiga Kozinc
- Andrej Marusic Institute, Department of Health Study, University of Primorska, 6000 Koper, Slovenia;
- Faculty of Health Sciences, University of Primorska, 6310 Izola, Slovenia
| | - Nejc Šarabon
- Andrej Marusic Institute, Department of Health Study, University of Primorska, 6000 Koper, Slovenia;
- Human Health Department, InnoRenew CoE, 6310 Izola, Slovenia
- Laboratory for Motor Control and Motor Behavior, S2P, Science to Practice, Ltd., 1000 Ljubljana, Slovenia
- Correspondence:
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14
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Rogers MW, Creath RA, Gray V, Abarro J, McCombe Waller S, Beamer BA, Sorkin JD. Comparison of Lateral Perturbation-Induced Step Training and Hip Muscle Strengthening Exercise on Balance and Falls in Community-Dwelling Older Adults: A Blinded Randomized Controlled Trial. J Gerontol A Biol Sci Med Sci 2021; 76:e194-e202. [PMID: 33491052 DOI: 10.1093/gerona/glab017] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND This factorial, assessor-blinded, randomized, and controlled study compared the effects of perturbation-induced step training (lateral waist-pulls), hip muscle strengthening, and their combination, on balance performance, muscle strength, and prospective falls among older adults. METHODS Community-dwelling older adults were randomized to 4 training groups. Induced step training (IST, n = 25) involved 43 progressive perturbations. Hip abduction strengthening (HST, n = 25) utilized progressive resistance exercises. Combined training (CMB, n = 25) included IST and HST, and the control performed seated flexibility/relaxation exercises (SFR, n = 27). The training involved 36 sessions for a period of 12 weeks. The primary outcomes were the number of recovery steps and first step length, and maximum hip abduction torque. Fall frequency during 12 months after training was determined. RESULTS Overall, the number of recovery steps was reduced by 31% and depended upon the first step type. IST and CMB increased the rate of more stable single lateral steps pre- and post-training than HST and SFR who used more multiple crossover and sequential steps. The improved rate of lateral steps for CMB exceeded the control (CMB/SFR rate ratio 2.68). First step length was unchanged, and HST alone increased hip torque by 25%. Relative to SFR, the fall rate ratios (falls/person/year) [95% confidence interval] were CMB 0.26 [0.07-0.90], IST 0.44 [0.18-1.08], and HST 0.30 (0.10-0.91). CONCLUSIONS Balance performance through stepping was best improved by combining perturbation and strength training and not strengthening alone. The interventions reduced future falls by 56%-74% over the control. Lateral balance perturbation training may enhance traditional programs for fall prevention.
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Affiliation(s)
- Mark W Rogers
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, US
| | - Robert A Creath
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, US.,Department of Exercise Science, Lebanon Valley College, Annville, Pennsylvania, US
| | - Vicki Gray
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, US
| | - Janice Abarro
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, US
| | - Sandy McCombe Waller
- Department of Physical Therapy and Rehabilitation Science, University of Maryland School of Medicine, Baltimore, US
| | - Brock A Beamer
- Division of Gerontology and Geriatric Medicine, University of Maryland School of Medicine, Baltimore, US.,Baltimore VA Medical Center, Geriatric Research, Education, and Clinical Center (GRECC), Maryland, US
| | - John D Sorkin
- Division of Gerontology and Geriatric Medicine, University of Maryland School of Medicine, Baltimore, US.,Baltimore VA Medical Center, Geriatric Research, Education, and Clinical Center (GRECC), Maryland, US
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15
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Unger J, Chan K, Lee JW, Craven BC, Mansfield A, Alavinia M, Masani K, Musselman KE. The Effect of Perturbation-Based Balance Training and Conventional Intensive Balance Training on Reactive Stepping Ability in Individuals With Incomplete Spinal Cord Injury or Disease: A Randomized Clinical Trial. Front Neurol 2021; 12:620367. [PMID: 33603710 PMCID: PMC7884853 DOI: 10.3389/fneur.2021.620367] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/11/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: Impaired balance leads to falls in individuals with motor incomplete spinal cord injury or disease (iSCI/D). Reactive stepping is a strategy used to prevent falls and Perturbation-based Balance Training (PBT) can improve this ability. Objective: The objective of this study was to determine if PBT results in greater improvements in reactive stepping ability than frequency-matched Conventional Intensive Balance Training (CIBT) in adults with iSCI/D. Design: Randomized clinical trial. Setting: Tertiary SCI/D rehabilitation center. Participants: Twenty-one adults with chronic (>1 year) iSCI/D were randomized. Due to one drop out 20 participants completed the study. Methods: Participants were randomly allocated to complete either PBT or CIBT three times per week for 8 weeks. Both programs included challenging static and dynamic balance tasks, but the PBT group also experienced manual external balance perturbations. Main Outcome Measures: Assessments of reactive stepping ability using the Lean-and-Release test were completed at baseline, and after 4 and 8 weeks of training, and 3 and 6 months after training completion. A blinded assessor evaluated secondary outcomes. Results: Twenty-five participants were screened and 21 consented; one withdrew. Ten PBT and 10 CIBT participants were included in analyses. Across all participants there were improvements in reactive stepping ability (p = 0.049), with retention of improvements at follow up assessments. There were no differences in reactive stepping ability between groups [median (interquartile range): PBT 0.08 (0.68); CIBT 0.00 (0.22)]. One participant in the PBT group experienced a non-injurious fall during training. Conclusions: Balance training is beneficial for individuals with iSCI/D, but the addition of manual perturbations (i.e., PBT) did not prove advantageous for performance on a measure of reactive stepping ability. Clinical Trial Registration:www.ClinicalTrials.gov, identifier: NCT02960178.
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Affiliation(s)
- Janelle Unger
- Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada.,KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada
| | - Katherine Chan
- KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada
| | - Jae W Lee
- KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - B Catharine Craven
- Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada.,KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada.,Department of Medicine, Division of Physical Medicine and Rehabilitation, University of Toronto, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Avril Mansfield
- KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada.,Evaluative Clinical Sciences, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Physical Therapy, University of Toronto, Toronto, ON, Canada
| | - Mohammad Alavinia
- KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada
| | - Kei Masani
- KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Kristin E Musselman
- Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada.,KITE at Toronto Rehabilitation Institute-University Health Network, Toronto, ON, Canada.,Department of Physical Therapy, University of Toronto, Toronto, ON, Canada
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16
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Aviles J, Wright DL, Allin LJ, Alexander NB, Madigan ML. Improvement in trunk kinematics after treadmill-based reactive balance training among older adults is strongly associated with trunk kinematics before training. J Biomech 2020; 113:110112. [PMID: 33190053 DOI: 10.1016/j.jbiomech.2020.110112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 10/05/2020] [Accepted: 10/29/2020] [Indexed: 10/23/2022]
Abstract
Reactive balance training (RBT) is an emerging fall prevention exercise intervention for older adults. To better understand factors that influence improvements after RBT, the goal of this study was to identify key factors that strongly associate with training-induced improvements in reactive balance. This study is a secondary analysis of data from a prior study. Twenty-eight residents of senior housing facilities participated, including 14 RBT participants and 14 Tai Chi participants (controls). Before and one week after training, participants completed balance and mobility tests and a reactive balance test. Reactive balance was operationalized as the maximum trunk angle in response to standardized trip-like perturbations on a treadmill. Bivariate (Pearson) correlation was used to identify participant characteristics before RBT and measures of performance during RBT that associated with training-induced changes in maximum trunk angle. Maximum trunk angle before reactive balance training exhibited the strongest association with training-induced changes in maximum trunk angle among RBT participants (r2 = 0.84; p < .001), but not among Tai Chi participants (r2 = 0.17; p = .138). Measures of performance during RBT, based upon perturbation speed, also associated with RBT-induced improvements in maximum trunk angle. These results help clarify the characteristics of individuals who can benefit from RBT, and support the use of treadmill perturbation speed as a surrogate measure of training-induced improvements in trunk kinematics.
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Affiliation(s)
- Jessica Aviles
- Department of Biomedical Engineering and Mechanics (0298), Virginia Tech, Blacksburg, VA 24061, USA.
| | - David L Wright
- Department of Health and Kinesiology (4243), Texas A&M University, College Station, TX 77843, USA.
| | - Leigh J Allin
- Department of Biomedical Engineering and Mechanics (0298), Virginia Tech, Blacksburg, VA 24061, USA.
| | - Neil B Alexander
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, USA; Veterans Affairs Ann Arbor Health Care System Geriatric Research Education and Clinical Center, Michigan 48105, USA.
| | - Michael L Madigan
- Department of Biomedical Engineering and Mechanics (0298), Virginia Tech, Blacksburg, VA 24061, USA; Grado Department of Industrial and Systems Engineering (0118), Virginia Tech, Blacksburg, VA 24061, USA.
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17
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Ryan AS, Roy A, Oursler KK. Gait and Balance Biomechanics in Older Adults With and Without Human Immunodeficiency Virus. AIDS Res Hum Retroviruses 2020; 35:1089-1094. [PMID: 31547668 DOI: 10.1089/aid.2019.0102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Balance deficits impose limitations and can impede safe walking contributing to falls and falls-related complications. The objective of this study was to perform an in-depth balance assessment and compare domains of limitations in older men with and without HIV infection. Fifteen sedentary African American men either with HIV (n = 6) or without HIV (n = 9 controls) participated. Standing balance was assessed under quiet stance on dual synchronized force plates during three 30 s trials with eyes open. Participants also completed standardized clinical instruments of balance, including the Berg Balance Scale (BBS) and Dynamic Gait Index (DGI). Older participants with HIV have lower BBS and DGI scores than controls (both p < .05). Adults with HIV have nearly twice the magnitude greater center of pressure (COP) sway variability than controls (1.42 ± 1.20 cm2 vs. 0.71 ± 0.1 cm2, p < .05). These data demonstrating differences in COP sway area between groups may further support evidence of potential fall risk and contribute to frailty in older adults with HIV.
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Affiliation(s)
- Alice S. Ryan
- VA Maryland Health Care System, Baltimore VA Medical Center, Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Geriatric Research, Education and Clinical Center (GRECC), VA Maryland Health Care System, Baltimore, Maryland
- Division of Infectious Disease, Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, Virginia
- Salem Veterans Affairs Medical Center, Salem, Virginia
| | - Anindo Roy
- VA Maryland Health Care System, Baltimore VA Medical Center, Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Geriatric Research, Education and Clinical Center (GRECC), VA Maryland Health Care System, Baltimore, Maryland
- Division of Infectious Disease, Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, Virginia
- Salem Veterans Affairs Medical Center, Salem, Virginia
| | - Krisann K. Oursler
- VA Maryland Health Care System, Baltimore VA Medical Center, Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
- Baltimore VA Medical Center, Geriatric Research, Education and Clinical Center (GRECC), VA Maryland Health Care System, Baltimore, Maryland
- Division of Infectious Disease, Department of Medicine, Virginia Tech Carilion School of Medicine, Roanoke, Virginia
- Salem Veterans Affairs Medical Center, Salem, Virginia
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18
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Handelzalts S, Alexander NB, Mastruserio N, Nyquist LV, Strasburg DM, Ojeda LV. Detection of Real-World Trips in At-Fall Risk Community Dwelling Older Adults Using Wearable Sensors. Front Med (Lausanne) 2020; 7:514. [PMID: 32984385 PMCID: PMC7492551 DOI: 10.3389/fmed.2020.00514] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 07/24/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Near-falls such as a trip, slip, stumble, or misstep involve a loss of balance (LOB) that does not result in a fall, occur more frequently than actual falls, and are associated with an increased fall risk. To date, studies have largely involved detection of simulated laboratory LOBs using wearable devices in young adults. Data on the detection of and kinematics of naturally occurring LOBs in people at high risk of falling are lacking. This may provide a new way to identify older adults at high risk for falls. We aimed to explore key body kinematics underlying real-world trips in at-fall risk community dwelling older adults wearing inertial measurement units (IMU). Methods: Five community-dwelling older adults with a history of falls who reported trips during the study period participated. They wore a voice recorder and 4 IMUs mounted on feet, lower back and wrist for two consecutive weeks to provide a record of the context and timing of LOB events. Sensor data prior to time-stamped voice recording of a trip were processed in order to visually identify unusual foot trajectories and lower back and arm orientations. Then, data of feet, lower back and wrist position and orientation were combined to create a three-dimensional animation representing the estimated body motion during the noted time segments in order to corroborate the occurrence of a trip. Events reported as a trip by the participant and identified as a trip by a researcher, blinded to voice recordings description, were included in the final analysis. Results: A total of 18 trips obtained from five participants were analyzed. Twelve trips occurred at home, three outside and for three the location was not reported. Trips were identified in the sensor data by observing (1) additional peaks to the typical foot velocity signal during swing phase; (2) increased velocity of the contralateral foot and (3) sharp changes in lower back pitch angles. Conclusions: Our approach demonstrates the feasibility of identifying and studying the mechanisms and context underlying trip-related LOBs in at-fall risk older adults during real world activities.
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Affiliation(s)
- Shirley Handelzalts
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States.,Department of Physical Therapy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Department of Physical Therapy, Loewenstein Rehabilitation Hospital, Ra'anana, Israel
| | - Neil B Alexander
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States.,VA Ann Arbor Health Care System Geriatrics Research Education and Clinical Center, Ann Arbor, MI, United States
| | - Nicholas Mastruserio
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, United States
| | - Linda V Nyquist
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Debra M Strasburg
- Division of Geriatric and Palliative Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, United States
| | - Lauro V Ojeda
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, United States
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19
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Allin LJ, Brolinson PG, Beach BM, Kim S, Nussbaum MA, Roberto KA, Madigan ML. Perturbation-based balance training targeting both slip- and trip-induced falls among older adults: a randomized controlled trial. BMC Geriatr 2020; 20:205. [PMID: 32532221 PMCID: PMC7291462 DOI: 10.1186/s12877-020-01605-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 06/08/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Falls are the leading cause of injuries among older adults. Perturbation-based balance training (PBT) is an innovative approach to fall prevention that aims to improve the reactive balance response following perturbations such as slipping and tripping. Many of these PBT studies have targeted reactive balance after slipping or tripping, despite both contributing to a large proportion of older adult falls. The goal of this randomized controlled trial was to evaluate the effects of PBT targeting slipping and tripping on laboratory-induced slips and trips. To build upon prior work, the present study included: 1) a control group; 2) separate training and assessment sessions; 3) PBT methods potentially more amenable for use outside the lab compared to methods employed elsewhere, and 4) individualized training for older adult participants. METHODS Thirty-four community-dwelling, healthy older adults (61-75 years) were assigned to PBT or a control intervention using minimization. Using a parallel design, reactive balance (primary outcome) and fall incidence were assessed before and after four sessions of BRT or a control intervention involving general balance exercises. Assessments involved exposing participants to an unexpected laboratory-induced slip or trip. Reactive balance and fall incidence were compared between three mutually-exclusive groups: 1) baseline participants who experienced a slip (or trip) before either intervention, 2) post-control participants who experienced a slip (or trip) after the control intervention, and 3) post-PBT participants who experienced a slip (or trip) after PBT. Neither the participants nor investigators were blinded to group assignment. RESULTS All 34 participants completed all four sessions of their assigned intervention, and all 34 participants were analyzed. Regarding slips, several measures of reactive balance were improved among post-PBT participants when compared to baseline participants or post-control participants, and fall incidence among post-PBT participants (18%) was lower than among baseline participants (80%). Regarding trips, neither reactive balance nor fall incidence differed between groups. CONCLUSIONS PBT targeting slipping and tripping improved reactive balance and fall incidence after laboratory-induced slips. Improvements were not observed after laboratory-induced trips. The disparity in efficacy between slips and trip may have resulted from differences in dosage and specificity between slip and trip training. TRIAL REGISTRATION Name of Clinical Trial Registry: clinicaltrials.gov Trial Registration number: NCT04308239. Date of Registration: March 13, 2020 (retrospectively registered).
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Affiliation(s)
- Leigh J Allin
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, USA
| | | | - Briana M Beach
- Edward Via College of Osteopathic Medicine, Blacksburg, VA, USA
| | - Sunwook Kim
- Grado Department of Industrial and Systems Engineering, Virginia Tech, 250 Durham Hall (0118), 1145 Perry Street, Blacksburg, VA, USA
| | - Maury A Nussbaum
- Grado Department of Industrial and Systems Engineering, Virginia Tech, 250 Durham Hall (0118), 1145 Perry Street, Blacksburg, VA, USA
| | - Karen A Roberto
- Institute for Society, Culture and Environment, Center for Gerontology, Virginia Tech, Blacksburg, VA, USA
| | - Michael L Madigan
- Grado Department of Industrial and Systems Engineering, Virginia Tech, 250 Durham Hall (0118), 1145 Perry Street, Blacksburg, VA, USA.
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Hicks GE. Addressing Balance, Mobility, and Falls: Are We Moving the Needle on Fall Prevention? J Gerontol A Biol Sci Med Sci 2020; 74:1487-1488. [PMID: 30892593 DOI: 10.1093/gerona/glz064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Gregory E Hicks
- Department of Physical Therapy, University of Delaware, Newark
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21
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Aviles J, Porter GC, Estabrooks PA, Alexander NB, Madigan ML. Potential Implementation of Reactive Balance Training within Continuing Care Retirement Communities. TRANSLATIONAL JOURNAL OF THE AMERICAN COLLEGE OF SPORTS MEDICINE 2020; 5:51-58. [PMID: 33447659 DOI: 10.1249/tjx.0000000000000120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE The purpose of the study was to evaluate the feasibility of implementing reactive balance training (RBT) in continuing care retirement communities, as a part of typical practice in these facilities. METHODS RBT, a task-specific exercise program, consisted of repeatedly exposing participants to trip-like perturbations on a modified treadmill to improve reactive balance, and subsequently reduce fall risk. Semi-structured interviews were conducted with retirement community residents (RBT participants) and administrators, to assess the organizational context, perceptions of evidence for falls prevention, and facilitation strategies that could improve the likelihood of implementing RBT as a falls-prevention program. RESULTS Contextual factors such as leadership support, culture of change, evaluation capabilities, and receptivity to RBT among administrators and health leaders at the participating retirement communities could facilitate future implementation. The cost associated with RBT (e.g. equipment and personnel), resident recruitment, and accessibility of RBT for many residents were identified as primary barriers related to the intervention. Participants perceived observable health benefits after completing RBT, had increased awareness toward tripping, and greater confidence with respect to mobility. Across interviewees potential barriers for implementation regarding facilitation revolved around the compatibility and customizability for different participant capabilities that would need to be considered before adopting RBT. CONCLUSION RBT could fill a need in retirement communities and the findings provide areas of context, characteristics of the intervention, and facilitation approaches that could improve uptake.
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Affiliation(s)
- Jessica Aviles
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA
| | - Gwenndolyn C Porter
- Department of Health Promotion, University of Nebraska Medical Center, Omaha, NE
| | - Paul A Estabrooks
- Department of Health Promotion, University of Nebraska Medical Center, Omaha, NE
| | - Neil B Alexander
- University of Michigan and Ann Arbor Veterans Affairs Health Care System Geriatric Research Education and Clinical Center
| | - Michael L Madigan
- Grado Department of Industrial & Systems Engineering, Virginia Tech, Blacksburg, VA
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22
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Yang F, Su X, Wen PS, Lazarus J. Adaptation to repeated gait-slip perturbations among individuals with multiple sclerosis. Mult Scler Relat Disord 2019; 35:135-141. [DOI: 10.1016/j.msard.2019.07.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 06/30/2019] [Accepted: 07/22/2019] [Indexed: 01/25/2023]
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