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Edwards CM, da Silva D, Puranda JL, Miller É, Semeniuk K, Adamo KB. Are physical fitness, a history of childbirth and injury history related to knee valgus in female Canadian Armed Forces members during a bodyweight overhead squat movement? BMJ Mil Health 2024:e002653. [PMID: 38862249 DOI: 10.1136/military-2023-002653] [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: 01/02/2024] [Accepted: 05/04/2024] [Indexed: 06/13/2024]
Abstract
OBJECTIVES A history of childbirth is associated with musculoskeletal injury (MSKi) in female members of the Canadian Armed Forces (CAF). While previous injury and pregnancy impact knee kinematics, it is unclear if a history of childbirth is associated with medial knee displacement (MKD) in an overhead squat movement screen. The aim of this study is to examine the relationship between MKD and (1) MSKi and (2) parity status in female CAF members. METHODS 24 nulliparous and 21 parous female participants employed by the CAF completed a comprehensive physical fitness assessment of muscular flexibility, power, strength, endurance, aerobic capacity and a bodyweight overhead squat movement screen (recorded using two-dimensional video, and hip-knee-ankle angle measured using Kinovea software). Interactions between MKD, parity status and MSKi history were assessed by one-way analysis of variance and two-way analysis of covariance (ANCOVA) (adjusted for age). RESULTS An interaction between parity status and acute injury of the lower extremity was observed (F=4.379, p=0.043, η2 =0.099) in MKD of the right knee. The two-way ANCOVA examining acute injury of the lumbopelvic hip complex (lower back, pelvis, hip) yielded an interaction between acute injury to the lumbopelvic hip complex and parity status (F=4.601, p=0.038, η2=0.103) in MKD asymmetry. DISCUSSION Parous participants with acute injury to the lower extremity had larger MKD than parous without this injury type. Parous participants without acute injury to the lumbopelvic hip complex had greater MKD asymmetry than nulliparous without this injury type. Our findings suggest that researchers and clinicians should consider parity status in conjunction with MSKi history when assessing knee kinematics in female military members.
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Affiliation(s)
| | - D da Silva
- Department of Sports Studies, Bishop's University, Sherbrooke, Quebec, Canada
| | - J L Puranda
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - É Miller
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - K Semeniuk
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - K B Adamo
- Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
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Edwards CM, da Silva DF, Puranda JL, Souza SCS, Semeniuk K, Adamo KB. Associations Between Rank, Sex, and Parity With Musculoskeletal Injuries Sustained During Annual Military Physical Fitness Test. J Strength Cond Res 2024; 38:367-373. [PMID: 37815270 DOI: 10.1519/jsc.0000000000004606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
ABSTRACT Edwards, CM, da Silva, DF, Puranda, JL, Souza, SCS, Semeniuk, K, and Adamo, KB. Associations between rank, sex, and parity with musculoskeletal injuries sustained during annual military physical fitness test. J Strength Cond Res 38(2): 367-373, 2024-Musculoskeletal injuries pose a significant threat to the well-being of military personnel. Attempts to use physical employment standard test results as predictors of injury are underway, but little is known about injuries sustained during the tests. This study sought to identify body regions most likely to be reported as injured during the annual Canadian Armed Forces (CAF) physical fitness evaluation. In addition, sex, rank, and parity status are explored as possible associated factors for injury. A total of 1,796 actively serving CAF members were categorized by sex (1,030 male participants; 766 female participants), rank (1,142 Non-Commissioned Members [NCM]; 638 Officers), and parity (314 parous female participants; 435 nulliparous female participants). Sex, rank, and parity were associated with body regions reportedly injured during an annual CAF fitness assessment (significance p ≤ 0.05). When compared with male participants, female participants were more likely to be injured {aOR: 1.797 (95% [confidence interval] CI: 1.45-2.23)} and more prone to injury of the wrist (adjusted odds ratio [aOR]: 1.933 [95% CI: 1.20-3.12]), hip (aOR: 3.445 [95% CI: 2.07-5.728]), or lower back (aOR: 1.55 [95% CI: 1.18-2.04]). Non-Commissioned Members were more likely to injure the neck (aOR: 2.14 [95% CI: 1.18-3.88]) or shoulder (aOR: 2.03 [95% CI: 1.31-3.15]), when compared with Officers. Parous female participants reported pelvis/abdomen injury at a higher rate than the nulliparous group (5 vs. 1.7%, p = 0.019). Injuries sustained during an annual CAF fitness assessment differ based on sex, rank, and parity. Canadian Armed Forces female participants, NCM, and parous female participants may require specific physical fitness support in preparation for the annual physical fitness test.
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Affiliation(s)
- Chris Margaret Edwards
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada; and
| | - Danilo Fernandes da Silva
- Sports Studies Department, Faculty of Arts and Science, Bishop's University, Sherbrooke, Quebec, Canada
| | - Jessica Laura Puranda
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada; and
| | | | - Kevin Semeniuk
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada; and
| | - Kristi Bree Adamo
- School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada; and
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Williamson C, Baumann J, Murphy D. Military families: the impacts of having a first child during service on military mothers. BMJ Mil Health 2023; 169:403-407. [PMID: 34599082 DOI: 10.1136/bmjmilitary-2021-001928] [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: 06/24/2021] [Accepted: 09/08/2021] [Indexed: 11/04/2022]
Abstract
INTRODUCTION The rights, roles and responsibilities of servicewomen in the UK Armed Forces has changed dramatically over time. Previously, service personnel were automatically discharged from the military if they became pregnant. As the percentage of servicewomen in the UK Armed Forces increases, having children during service is becoming more common and maternity policies are now in place. Having children during military service can impact on the health and well-being of servicewomen, including a greater risk of illness when returning to work. METHODS A cross-sectional, self-report survey was used for data collection. The response rate was approximately 45%. Female Army veterans were recruited via a female military association. The survey collected data on parental status, the timing of their first child (during or after service), and several current mental and physical health and well-being outcomes. RESULTS Of the 750 female Army veterans who completed the survey, 406 reported having children. Of those with children, 14.5% had their first child during service compared with 85.5% after service. The most frequently endorsed health outcomes were low social support, loneliness and common mental health difficulties. Participants who had their first child during military service were more likely to have left the service non-voluntarily. CONCLUSIONS This study provided insight into the impacts of having a first child during military service on servicewomen. Overall, female Army veterans who had their first child during service had poorer outcomes, including leaving service non-voluntarily. However, none of the health or well-being outcomes remained significant after adjusting the results. This study explored a widely under researched population and field of research. Future research should seek to expand on our findings and continue to explore the impacts of having a first child during military service for military mothers.
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Affiliation(s)
- Charlotte Williamson
- King's Centre for Military Health Research, King's College London, London, UK
- Department of Research, Combat Stress, Leatherhead, Surrey, UK
| | - J Baumann
- Department of Research, Combat Stress, Leatherhead, Surrey, UK
| | - D Murphy
- King's Centre for Military Health Research, King's College London, London, UK
- Department of Research, Combat Stress, Leatherhead, Surrey, UK
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Dyches KD, Friedl KE, Greeves JP, Keller MF, McClung HL, McGurk MS, Popp KL, Teyhen DS. Physiology of Health and Performance: Enabling Success of Women in Combat Arms Roles. Mil Med 2023; 188:19-31. [PMID: 37490562 DOI: 10.1093/milmed/usac256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 02/28/2022] [Accepted: 08/16/2022] [Indexed: 07/27/2023] Open
Abstract
INTRODUCTION The modern female soldier has yet to be fully characterized as she steps up to fill new combat roles that have only recently been opened to women. Both U.S. and U.K. military operational research efforts are supporting a science-based evolution of physical training and standards for female warfighters. The increasing representation of women in all military occupations makes it possible to discover and document the limits of female physiological performance. METHOD An informal Delphi process was used to synthesize an integrated concept of current military female physiological research priorities and emerging findings using a panel of subject matter experts who presented their research and perspectives during the second Women in Combat Summit hosted by the TriService Nursing Research Program in February 2021. RESULTS The physical characteristics of the modern soldier are changing as women train for nontraditional military roles, and they are emerging as stronger and leaner. Capabilities and physique will likely continue to evolve in response to new Army standards and training programs designed around science-based sex-neutral requirements. Strong bones may be a feature of the female pioneers who successfully complete training and secure roles traditionally reserved for men. Injury risk can be reduced by smarter, targeted training and with attention directed to female-specific hormonal status, biomechanics, and musculoskeletal architecture. An "estrogen advantage" appears to metabolically support enhanced mental endurance in physically demanding high-stress field conditions; a healthy estrogen environment is also essential for musculoskeletal health. The performance of female soldiers can be further enhanced by attention to equipment that serves their needs with seemingly simple solutions such as a suitable sports bra and personal protective equipment that accommodates the female anatomy. CONCLUSIONS Female physiological limits and performance have yet to be adequately defined as women move into new roles that were previously developed and reserved for men. Emerging evidence indicates much greater physical capacity and physiological resilience than previously postulated.
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Affiliation(s)
- Karmon D Dyches
- Military Operational Medicine Research Program, U.S. Army Medical Research and Development Command, Fort Detrick, MD 21702, USA
| | - Karl E Friedl
- Biophysics and Biomedical Modeling Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
| | - Julie P Greeves
- Department of Army Health and Performance Research (AHPR), British Army, Andover, Hampshire SP11 8HT, UK
| | - Margaux F Keller
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
| | - Holly L McClung
- Biophysics and Biomedical Modeling Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
| | - Michael S McGurk
- Research and Analysis Directorate, U.S. Army Center for Initial Military Training, Fort Eustis, VA 23604, USA
| | - Kristin L Popp
- Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760, USA
| | - Deydre S Teyhen
- Chief, U.S. Army Medical Specialist Corps, U.S. Army Medical Command, Falls Church, VA 22042, USA
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Elliott-Sale KJ, Bostock EL, Jackson T, Wardle SL, O'Leary TJ, Greeves JP, Sale C. Investigating the Efficacy of an 18-Week Postpartum Rehabilitation and Physical Development Intervention on Occupational Physical Performance and Musculoskeletal Health in UK Servicewomen: Protocol for an Independent Group Study Design. JMIR Res Protoc 2022; 11:e32315. [PMID: 35648463 PMCID: PMC9201705 DOI: 10.2196/32315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 03/08/2022] [Accepted: 03/18/2022] [Indexed: 11/20/2022] Open
Abstract
Background Postpartum women are at an increased risk of pelvic floor dysfunction, musculoskeletal injury, and poor psychological health and have reduced physical fitness compared to before pregnancy. There is no formal, evidence-based rehabilitation and physical development program for returning UK servicewomen to work following childbirth. Objective This study aims to examine the efficacy of a rehabilitation and physical development intervention for returning postpartum UK servicewomen to occupational fitness. Methods Eligible servicewomen will be assigned to a training or control group in a nonrandomized controlled trial 6 weeks after childbirth. Group allocation will be based on the location of standard pregnancy and postpartum care. The control group will receive standard care, with no prescribed intervention. The training group will start an 18-week core and pelvic health rehabilitation program 6 weeks post partum and a 12-week resistance and high-intensity interval training program 12 weeks post partum. All participants will attend 4 testing sessions at 6, 12, 18, and 24 weeks post partum for the assessment of occupational physical performance, pelvic health, psychological well-being, quality of life, and musculoskeletal health outcomes. Occupational physical performance tests will include vertical jump, mid-thigh pull, seated medicine ball throw, and a timed 2-km run. Pelvic health tests will include the Pelvic Organ Prolapse Quantification system, the PERFECT (power, endurance, repetitions, fast, every contraction timed) scheme for pelvic floor strength, musculoskeletal physiotherapy assessment, the Pelvic Floor Distress Inventory–20 questionnaire, and the International Consultation on Incontinence Questionnaire–Vaginal Symptoms. Psychological well-being and quality of life tests will include the World Health Organization Quality of Life questionnaire and the Edinburgh Postnatal Depression Scale. Musculoskeletal health outcomes will include body composition; whole-body areal bone mineral density; tibial volumetric bone mineral density, geometry, and microarchitecture; patella tendon properties; muscle architecture; muscle protein and collagen turnover; and muscle mass and muscle breakdown. Data will be analyzed using linear mixed-effects models, with participants included as random effects, and group and time as fixed effects to assess within- and between-group differences over time. Results This study received ethical approval in April 2019 and recruitment started in July 2019. The study was paused in March 2020 owing to the COVID-19 pandemic. Recruitment restarted in May 2021. The results are expected in September 2022. Conclusions This study will inform the best practice for the safe and optimal return of postpartum servicewomen to physically and mentally demanding jobs. Trial Registration ClinicalTrials.gov NCT04332757; https://clinicaltrials.gov/ct2/show/NCT04332757 International Registered Report Identifier (IRRID) DERR1-10.2196/32315
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Affiliation(s)
- Kirsty Jayne Elliott-Sale
- Musculoskeletal Physiology Research Group, Sport, Health and Performance Enhancement Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom.,Institute of Sport, Manchester Metropolitan University, Manchester, United Kingdom
| | - Emma Louise Bostock
- Musculoskeletal Physiology Research Group, Sport, Health and Performance Enhancement Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Thea Jackson
- Musculoskeletal Physiology Research Group, Sport, Health and Performance Enhancement Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Sophie Louise Wardle
- Army Health and Performance Research, Army Headquarters, Andover, United Kingdom
| | - Thomas James O'Leary
- Army Health and Performance Research, Army Headquarters, Andover, United Kingdom
| | | | - Craig Sale
- Musculoskeletal Physiology Research Group, Sport, Health and Performance Enhancement Research Centre, School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom.,Institute of Sport, Manchester Metropolitan University, Manchester, United Kingdom
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Hossain-López S, Ruiz-Berdún D. Being a woman, being a soldier, being a mother: a qualitative analysis of perceptions of pregnancy on working lives of women in the Spanish Armed Forces. BMJ Mil Health 2021; 168:64-69. [PMID: 33688081 DOI: 10.1136/bmjmilitary-2020-001722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/30/2021] [Accepted: 02/09/2021] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Thirty-two years after Spain first allowed women to join the armed forces, 12% of active troops are women, although there are no data on how many of them are mothers. There is a lack of research related to the impact of motherhood on their careers and the challenges they face as well. Previous quantitative research, within North Atlantic Treaty Organization (NATO) forces, has focused on the increased vulnerability and reduced performance of women returning to service after childbirth. However, no study to date has examined the narratives of these women. METHODS A qualitative, cross-sectional study was carried out by means of individual interviews which were subsequently analysed employing the interpretative approach of hermeneutic phenomenology. All the interviews were conducted by videoconference, being recorded for subsequent transcription and analysis with MAXQDA v.2018. RESULTS Servicewoman reported experiencing fear of informing their command chain of their pregnancy. Many women described feelings of constantly having to prove their worth, and thus perceived the physical restrictions associated with pregnancy and/or postpartum as a threat to their previous achievements. This sometimes led to behaviours that posed a risk to the health of mothers and babies, or eventually resulted in both acute and chronic conditions. CONCLUSIONS Some restrictions put in place to protect them during their pregnancies become a source of additional anxiety. Returning to active service, we found that women's desire to fulfil their duties can cause long-term damage to their physical and psychological health. The attitudes servicewomen perceive towards pregnant women and mothers seems to exert a strong influence on the risks they are willing to assume. Understanding and addressing the needs of servicewomen after childbirth, either now, as active members of the Armed Forces, or in the foreseeable future, as veterans, is crucial to both military and civilian healthcare providers.
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Affiliation(s)
- Sheima Hossain-López
- Surgery, Medical and Social Sciences, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá de Henares, Alcala de Henares, Madrid, Spain
| | - D Ruiz-Berdún
- Surgery, Medical and Social Sciences, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá de Henares, Alcala de Henares, Madrid, Spain
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