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Lyng J, Morissette M, Ogborn D, Leiter J, MacDonald P, Longstaffe R. The impact of COVID-19 on national hockey league players' return to play. PHYSICIAN SPORTSMED 2024; 52:84-88. [PMID: 36744406 DOI: 10.1080/00913847.2023.2177080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/31/2023] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Evaluate the on-ice performance and return to play (RTP) rate following COVID-19 for National Hockey League (NHL) players during the 2020-21 season. METHODS Players with COVID-19 during the abbreviated 2020-21 season were identified using publicly accessible online sources. Demographics and on-ice metrics were accessed using the NHL's online statistics website. The length of time, rate of RTP, and games missed due to COVID-19 were analyzed. Primary outcomes included average time on ice (TOI) per game (TOI/G), average TOI per shift (TOI/S), and points per game (PPG) compared at different timepoints including pre- and post-COVID-19. RESULTS A total of 73 players (47 forwards, 18 defensemen, 8 goalies) had a documented COVID-19 diagnosis during the abbreviated 2020-21 season. Players missed an average of 5.6 games (14.7 days) due to COVID-19. The post-COVID-19 RTP rate was 97.3%, including playoffs. No differences were found in TOI/G between the pre- (15.7 ± 3.9 min) and post-COVID-19 (15.8 ± 3.4 min, p = 0.874) or in the first (15.8 ± 4.0 min) and second week (15.9 ± 3.8 min, p = 0.925) returned. TOI/shift did not change from pre- (45.6 ± 5.3 sec) to post-COVID-19 (46.7 ± 4.6 sec, p = 0.035) or in first (46.2 ± 5.4 sec) and second week post-COVID-19 (46.2 ± 4.8 sec, p = .854). No differences were identified for PPG between career, pre-COVID-19, and post-COVID-19 (0.44 vs 0.38 vs 0.41; p = 0.274). CONCLUSION RTP post-COVID was markedly high for NHL players. While the effects of COVID-19 on specific physiological measures remains to be elucidated, this study found NHL players do not have reduced performance following COVID-19.
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Affiliation(s)
- Jasmine Lyng
- Department of Surgery, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | | | - Dan Ogborn
- Department of Surgery, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada
- Department of Physical Therapy, College of Rehabilitation Sciences, University of Manitoba, Winnipeg, MB, Canada
| | | | - Peter MacDonald
- Department of Surgery, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada
| | - Robert Longstaffe
- Department of Surgery, Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada
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Hemstock R, Sommer M, McRae S, MacDonald P, Woodmass J, Ogborn D. Characterizing the Practices of Canadian Orthopedic Surgeons in the Management of patients With Anterior Glenohumeral Instability. Clin J Sport Med 2023; 33:611-617. [PMID: 37185225 DOI: 10.1097/jsm.0000000000001155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 03/28/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE To determine the practice patterns of Canadian orthopedic surgeons in the management of patients with anterior glenohumeral instability (AGHI). DESIGN Cross-sectional survey. SETTING Canada. PATIENTS OR OTHER PARTICIPANTS Canadian orthopedic surgeons with membership in the Canadian Orthopedic Association or Canadian Shoulder and Elbow Surgeon group who had managed at least 1 patient with AGHI in the previous year. INTERVENTIONS A survey including demographics and questions on the management of patients with AGHI was completed. Statistical comparisons (χ 2 ) were completed with responses stratified using the instability severity index score (ISIS) in practice, years of practice, and surgical volumes. MAIN OUTCOME MEASURES Summary statistics were compiled, and response frequencies were considered for consensus (75%). Case series responses were stratified on use of the ISIS in practice, years of experience, and annual procedure volumes (χ 2 , P < 0.05). RESULTS Eighty orthopedic surgeons responded, with consensus on areas of diagnostic workup of AGHI, nonoperative management, and operative techniques. There was no consensus on indications for soft tissue and bony augmentation or postoperative management. There was no difference in practices based on the use of ISIS, years in practice, or surgical volumes. CONCLUSIONS Canadian orthopedic surgeons manage AGHI consistently with consensus achieved in preoperative diagnostics and operative techniques, although debate remains as to the indications for soft tissue and bony augmentation procedures.
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Affiliation(s)
- Riley Hemstock
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
| | - Micah Sommer
- Max Rady College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Sheila McRae
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada; and
- Department of Physical Therapy, University of Manitoba, Winnipeg, MB, Canada
| | - Peter MacDonald
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada; and
| | - Jarret Woodmass
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada; and
| | - Dan Ogborn
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
- Pan Am Clinic Foundation, Winnipeg, MB, Canada; and
- Department of Physical Therapy, University of Manitoba, Winnipeg, MB, Canada
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Hemstock R, Mulhall D, Didyk J, Ogborn D, Lemmex D. Postoperative weight-bearing restrictions and rehabilitation protocols after hip arthroscopy for femoroacetabular impingement: a systematic review. J Hip Preserv Surg 2023; 10:220-227. [PMID: 38162279 PMCID: PMC10757416 DOI: 10.1093/jhps/hnad023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/24/2023] [Accepted: 07/11/2023] [Indexed: 01/03/2024] Open
Abstract
Despite recent increased interest in hip arthroscopy for the management of femoroacetabular impingement (FAI), there is little evidence to guide weight-bearing recommendations and rehabilitation postoperatively. The primary objective of this study was to determine if sufficient evidence exists to recommend specific weight-bearing restrictions postoperatively. This study was registered with PROSPERO (CRD42021247741). PubMed, MEDLINE and Embase were searched on 3 March 2023 for Level I-IV studies including patients over the age of 18 years, with a minimum 1-year follow-up and reporting of a weight-bearing status, a patient-reported outcome measure (PROM) and a clinical outcome. Meta-analysis was precluded due to heterogeneity in the included studies, and a descriptive analysis was undertaken. Methodological quality and risk of bias were assessed with the methodological index for non-randomized studies (MINORS). Twenty-four studies including 2231 patients who underwent hip arthroscopy for treatment of FAI were included (follow-up interval 33.2 ± 24.7 months). Most articles (62.5%) were case series. There were seven terms describing weight-bearing recommendations, with 83% being some variation of 'partial weight-bearing'. Eight PROMs were reported, with 83% using the modified Harris Hip Score and 87.5% of studies reporting reoperation rates. Only 75% of studies reported rehabilitation protocols. The average MINORS score was 11.07 ± 1.10 out of 16 for non-comparative studies and 18.22 ± 1.48 out of 24 for comparative studies. The reporting of weight-bearing status, clinical outcomes, PROMs and rehabilitation parameters remains poor. At present, sufficient comparative evidence does not exist to make specific weight-bearing recommendation postoperatively.
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Affiliation(s)
- Riley Hemstock
- Department of Surgery, Orthopedic Section, University of Manitoba, Canada AE101-820 Sherbrook Street, Winnipeg, Manitoba R3A 1R9, Canada
| | - Drew Mulhall
- Department of Surgery, Orthopedic Section, University of Manitoba, Canada AE101-820 Sherbrook Street, Winnipeg, Manitoba R3A 1R9, Canada
| | - Janine Didyk
- Department of Physical Therapy, University of Manitoba, Canada R106 - 771 McDermot Avenue, Winnipeg, Manitoba R3E 0T6, Canada
| | - Dan Ogborn
- Department of Physical Therapy, University of Manitoba, Canada R106 - 771 McDermot Avenue, Winnipeg, Manitoba R3E 0T6, Canada
- Pan Am Clinic Foundation, 75 Poseidon Bay, Winnipeg, Manitoba R3M 3E4, Canada
| | - Devin Lemmex
- Pan Am Clinic Foundation, 75 Poseidon Bay, Winnipeg, Manitoba R3M 3E4, Canada
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Schoenfeld BJ, Ogborn D, Piñero A, Burke R, Coleman M, Rolnick N. Fiber-Type-Specific Hypertrophy with the Use of Low-Load Blood Flow Restriction Resistance Training: A Systematic Review. J Funct Morphol Kinesiol 2023; 8:jfmk8020051. [PMID: 37218848 DOI: 10.3390/jfmk8020051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/24/2023] Open
Abstract
Emerging evidence indicates that the use of low-load resistance training in combination with blood flow restriction (LL-BFR) can be an effective method to elicit increases in muscle size, with most research showing similar whole muscle development of the extremities compared to high-load (HL) training. It is conceivable that properties unique to LL-BFR such as greater ischemia, reperfusion, and metabolite accumulation may enhance the stress on type I fibers during training compared to the use of LLs without occlusion. Accordingly, the purpose of this paper was to systematically review the relevant literature on the fiber-type-specific response to LL-BFR and provide insights into future directions for research. A total of 11 studies met inclusion criteria. Results of the review suggest that the magnitude of type I fiber hypertrophy is at least as great, and sometimes greater, than type II hypertrophy when performing LL-BFR. This finding is in contrast to HL training, where the magnitude of type II fiber hypertrophy tends to be substantially greater than that of type I myofibers. However, limited data directly compare training with LL-BFR to nonoccluded LL or HL conditions, thus precluding the ability to draw strong inferences as to whether the absolute magnitude of type I hypertrophy is indeed greater in LL-BFR vs. traditional HL training. Moreover, it remains unclear as to whether combining LL-BFR with traditional HL training may enhance whole muscle hypertrophy via greater increases in type I myofiber cross-sectional area.
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Affiliation(s)
- Brad J Schoenfeld
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY 10468, USA
| | - Dan Ogborn
- Department of Physical Therapy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Orthopedic Section, Department of Surgery, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Pan Am Clinic Foundation, Winnipeg, MB R3M 3E4, Canada
| | - Alec Piñero
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY 10468, USA
| | - Ryan Burke
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY 10468, USA
| | - Max Coleman
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY 10468, USA
| | - Nicholas Rolnick
- Department of Exercise Science and Recreation, CUNY Lehman College, Bronx, NY 10468, USA
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Beaudoin A, Ogborn D, McRae S, Larose G, Brown H, McCormack R, MacDonald P. No differences found in long-term outcomes of a randomized controlled trial comparing ipsilateral versus contralateral hamstring graft in ACL reconstruction. Knee Surg Sports Traumatol Arthrosc 2022; 30:3718-3725. [PMID: 35507037 DOI: 10.1007/s00167-022-06980-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 04/01/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Contralateral graft harvest in primary ACL reconstruction is relatively uncommon and the long-term comparative of this approach relative to ipsilateral harvest has not been described. The purpose of this study was to evaluate ACL graft and contralateral rupture following ipsilateral or contralateral semitendinosus and gracilis (STG) graft harvest at follow-up of a minimum 10 years post-reconstruction in the treatment of a complete ACL tear. METHODS Patients from a previous randomized trial were evaluated. The primary outcome measures were ipsilateral and contralateral reinjury as well as the International Knee Documentation Committee (IKDC) knee assessment form, the ACL Quality of Life questionnaire (ACL-QoL) and the Tegner activity scale. Participants completed four different single-leg hop tests and concentric knee flexion and extension strength were assessed on an isokinetic dynamometer. RESULTS Of the original 100 patients, 50 patients (41.3 ± 9.5 years of age, 31 males, 19 females) reported on re-injury at 12.6 ± 1.4 years post-operative. Thirty-eight patients returned for full assessment and 12 responded by mail or phone survey. There were no differences between groups for graft rupture, contralateral injury, ACL-QoL score, IKDC categorization, or anterior tibial translation, though both groups experienced a reduction in the Tegner Activity Scale from their preinjury scores. There was no difference in knee flexor and extensor isokinetic concentric strength, or single leg hop test performance. Knee flexor strength limb symmetry index was reduced when measured in the supine relative to the seated position in both groups, indicating persistent deficits in knee flexor strength when measured in the supine position. CONCLUSION Contralateral hamstring harvest does not put patients at an increased risk of a contralateral ACL tear and long-term outcomes of ACL reconstruction do not differ based on the side of graft harvest. Contralateral STG harvest may provide a safe alternative surgical option for select patients. LEVEL OF EVIDENCE Level II.
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Affiliation(s)
- Alisha Beaudoin
- Max Rady College of Medicine, University of Manitoba, 75 Poseidon Bay, Winnipeg, MB, R3M 3E4, Canada.
| | - Dan Ogborn
- Pan Am Clinic Foundation, Winnipeg, MB, Canada.,Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada.,Department of Physical Therapy, University of Manitoba, Winnipeg, MB, Canada
| | - Sheila McRae
- Pan Am Clinic Foundation, Winnipeg, MB, Canada.,Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada.,Department of Physical Therapy, University of Manitoba, Winnipeg, MB, Canada
| | - Gabriel Larose
- Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
| | - Holly Brown
- Pan Am Clinic Foundation, Winnipeg, MB, Canada
| | - Robert McCormack
- Department of Orthopaedic Surgery, University of British Columbia, Vancouver, BC, Canada
| | - Peter MacDonald
- Pan Am Clinic Foundation, Winnipeg, MB, Canada.,Department of Surgery, Orthopedic Section, University of Manitoba, Winnipeg, MB, Canada
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Bruinooge B, MacDonald P, McRae S, Ogborn D. Confidence And Performance Asymmetries Are Related To Psychological Readiness Following Acl Reconstruction. Med Sci Sports Exerc 2022. [DOI: 10.1249/01.mss.0000880540.80252.d8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Ogborn D, Bruinooge B, McRae S, MacDonald P. Quadriceps Strength And Drop Vertical Jump Ground Reaction Forces After Anterior Cruciate Ligament Reconstruction. Med Sci Sports Exerc 2022. [DOI: 10.1249/01.mss.0000880544.59229.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Ogborn D, McRae S, Larose G, Leiter J, Brown H, MacDonald P. Knee flexor strength and symmetry vary by device, body position and angle of assessment following ACL reconstruction with hamstring grafts at long-term follow-up. Knee Surg Sports Traumatol Arthrosc 2021; 31:1658-1664. [PMID: 34477895 DOI: 10.1007/s00167-021-06712-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 08/16/2021] [Indexed: 12/31/2022]
Abstract
PURPOSE Persistent deficits in knee flexor strength following harvest of semitendinosus and gracilis for anterior cruciate ligament reconstruction are inconsistent in the literature. Variation in methodology, including measuring torque at higher knee flexion angles may partially explain these discrepant findings. The objective of this study was to determine whether positioning (seated vs supine), consideration of peak or joint-angle-specific torque or device (Isokinetic Dynamometer vs NordBord Hamstring Dynamometer) impact the magnitude of knee flexor strength differences between limbs. METHODS Participants (n = 31, 44.2 ± 10.7 years,) who were at 14 ± 4.4 years follow-up for unilateral ACL reconstruction with semitendinosus/gracilis grafts completed the ACL Quality of Life outcome and an assessment including isokinetic concentric knee extensor and flexor strength in seated and supine with peak torque and torque at 60° (T60) and 75° (T75) knee flexion measured, followed by an eccentric Nordic Hamstring Curl. RESULTS Isokinetic concentric knee flexor torque was reduced in supine relative to seated, on the reconstructed limb against the unaffected, and at higher degrees of knee flexion relative to peak torque (T60 and T75 against peak torque). Limb symmetry varied by methodology (F(6,204) = 8.506, p = 0.001) with reduced symmetry in supine T75 against all measures (71.1 ± 16.5%, p < 0.05), supine T60 against seated peak torque (82.7 ± 14.2%, p < 0.05), and the NordBord was lower than seated peak torque that was not statistically significant (83.9 ± 12.8%, n.s.). Knee extensor peak (r2 = 0.167 (F(1,27) = 5.3, p = 0.03) and Nordic curl eccentric torque (r2 = 0.267, F(2,26) = 4.736, p = 0.02) were predictors of ACL-QoL score, although a combined model did not improve over Nordic torque alone. CONCLUSION Limb symmetry cannot be assumed in clinical practice across differing assessment methods for knee flexor strength as deficits are greatest in the supine position with torque measured at 75° knee flexion. Isokinetic knee extensor and eccentric knee flexor torque during the Nordic hamstring curl were predictors of ACL-QoL scoring and should be considered alongside patient-reported outcomes for patients following ACL reconstruction with hamstring grafts. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Dan Ogborn
- Pan Am Clinic Foundation, 75 Poseidon Bay, Office 307, Winnipeg, MB, R3M 3E4, Canada. .,College of Rehabilitation Sciences, Rady Faculty of Health Sciences, Winnipeg, MB, Canada.
| | - Sheila McRae
- Pan Am Clinic Foundation, 75 Poseidon Bay, Office 307, Winnipeg, MB, R3M 3E4, Canada.,College of Rehabilitation Sciences, Rady Faculty of Health Sciences, Winnipeg, MB, Canada.,Department of Surgery, Rady Faculty of Health Sciences, Winnipeg, MB, Canada
| | - Gabriel Larose
- Department of Surgery, Rady Faculty of Health Sciences, Winnipeg, MB, Canada
| | - Jeff Leiter
- Pan Am Clinic Foundation, 75 Poseidon Bay, Office 307, Winnipeg, MB, R3M 3E4, Canada
| | - Holly Brown
- Pan Am Clinic Foundation, 75 Poseidon Bay, Office 307, Winnipeg, MB, R3M 3E4, Canada
| | - Pete MacDonald
- Pan Am Clinic Foundation, 75 Poseidon Bay, Office 307, Winnipeg, MB, R3M 3E4, Canada.,Department of Surgery, Rady Faculty of Health Sciences, Winnipeg, MB, Canada
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Sommer MC, Wagner E, Zhu S, McRae S, MacDonald PB, Ogborn D, Woodmass JM. Complications of Superior Capsule Reconstruction for the Treatment of Functionally Irreparable Rotator Cuff Tears: A Systematic Review. Arthroscopy 2021; 37:2960-2972. [PMID: 33887411 DOI: 10.1016/j.arthro.2021.03.076] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 03/28/2021] [Accepted: 03/30/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE The purpose of this systematic review is to characterize the complications associated with superior capsule reconstruction (SCR) for the treatment of functionally irreparable rotator cuff tears (FIRCTs). METHODS This systematic review was completed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Two independent reviewers completed a search of PubMed, Embase, and Medline databases. Studies were deemed eligible for inclusion if they reported postoperative outcomes of arthroscopic SCR for FIRCTs and considered at least 1 postoperative complication. Statistical heterogeneity was quantified via the I2 statistic. Due to marked heterogeneity, pooled proportions were not reported. All complications and patient-reported outcomes were described qualitatively. RESULTS Fourteen studies met the inclusion/exclusion criteria. The overall complication rate post-SCR ranged from 5.0% to 70.0% (I2 = 84.9%). Image-verified graft retear ranged from 8% to 70%, I2 = 79.4%), with higher rates reported when SCR was performed using allograft (19%-70%, I2 76.6%) compared to autograft (8%-29%, I2 = 66.1%). Reoperation (0%-36%, I2 = 73.4%), revision surgeries (0%-21%, I2 = 81.2%), medical complications (0%-5%, I2 = 0.0%), and infections (0%-5%, I2 = 0.0%) were also calculated. CONCLUSIONS SCR carries a distinct complication profile when used for the treatment of FIRCTs. The overall rate of complications ranged from 5.0% to 70.0%. The most common complication is graft retear with higher ranges in allografts (19%-70%) compared to autografts (8%-29%). The majority of studies reported at least 1 reoperation (range, 0%-36%), most commonly for revision to reverse shoulder arthroplasty. LEVEL OF EVIDENCE Level IV, systematic review of Level IV or better investigations.
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Affiliation(s)
- Micah C Sommer
- Pan Am Clinic, Winnipeg, Manitoba, Canada; Department of Orthopaedic Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Eric Wagner
- Department of Orthopaedic Surgery, Emory University, Atlanta, Georgia, U.S.A
| | - Sophie Zhu
- Pan Am Clinic, Winnipeg, Manitoba, Canada; Department of Orthopaedic Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Sheila McRae
- Pan Am Clinic, Winnipeg, Manitoba, Canada; Department of Orthopaedic Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Peter B MacDonald
- Pan Am Clinic, Winnipeg, Manitoba, Canada; Department of Orthopaedic Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Dan Ogborn
- Pan Am Clinic, Winnipeg, Manitoba, Canada
| | - Jarret M Woodmass
- Pan Am Clinic, Winnipeg, Manitoba, Canada; Department of Orthopaedic Surgery, University of Manitoba, Winnipeg, Manitoba, Canada.
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Ogborn D. Optimizing Exercise Selection for the Asymmetric Athlete After Anterior Cruciate Ligament Reconstruction. Strength Cond J 2021. [DOI: 10.1519/ssc.0000000000000605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Schoenfeld BJ, Grgic J, Ogborn D, Krieger JW. Strength and Hypertrophy Adaptations Between Low- vs. High-Load Resistance Training: A Systematic Review and Meta-analysis. J Strength Cond Res 2018; 31:3508-3523. [PMID: 28834797 DOI: 10.1519/jsc.0000000000002200] [Citation(s) in RCA: 359] [Impact Index Per Article: 59.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Schoenfeld, BJ, Grgic, J, Ogborn, D, and Krieger, JW. Strength and hypertrophy adaptations between low- vs. high-load resistance training: a systematic review and meta-analysis. J Strength Cond Res 31(12): 3508-3523, 2017-The purpose of this article was to conduct a systematic review of the current body of literature and a meta-analysis to compare changes in strength and hypertrophy between low- vs. high-load resistance training protocols. Searches of PubMed/MEDLINE, Cochrane Library, and Scopus were conducted for studies that met the following criteria: (a) an experimental trial involving both low-load training [≤60% 1 repetition maximum (1RM)] and high-load training (>60% 1RM); (b) with all sets in the training protocols being performed to momentary muscular failure; (c) at least one method of estimating changes in muscle mass or dynamic, isometric, or isokinetic strength was used; (d) the training protocol lasted for a minimum of 6 weeks; (e) the study involved participants with no known medical conditions or injuries impairing training capacity. A total of 21 studies were ultimately included for analysis. Gains in 1RM strength were significantly greater in favor of high- vs. low-load training, whereas no significant differences were found for isometric strength between conditions. Changes in measures of muscle hypertrophy were similar between conditions. The findings indicate that maximal strength benefits are obtained from the use of heavy loads while muscle hypertrophy can be equally achieved across a spectrum of loading ranges.
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Affiliation(s)
| | - Jozo Grgic
- Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, Melbourne, Australia
| | - Dan Ogborn
- Ogborn Research & Consulting, Winnipeg, Manitoba, Canada
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Vigotsky AD, Beardsley C, Contreras B, Steele J, Ogborn D, Phillips SM. Greater Electromyographic Responses Do Not Imply Greater Motor Unit Recruitment and ‘Hypertrophic Potential’ Cannot Be Inferred. J Strength Cond Res 2017; 31:e1-e4. [DOI: 10.1519/jsc.0000000000001249] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Schoenfeld BJ, Ogborn D, Krieger JW. The dose-response relationship between resistance training volume and muscle hypertrophy: are there really still any doubts? J Sports Sci 2016; 35:1985-1987. [PMID: 27805470 DOI: 10.1080/02640414.2016.1243800] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Dan Ogborn
- b Total Rehabilitation and Sports Injuries Clinic , Winnipeg , MB , Canada
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Schoenfeld BJ, Ogborn D, Contreras B, Cappaert T, Silva Ribeiro A, Alvar BA, Vigotsky AD. A Comparison of Increases in Volume Load Over 8 Weeks of Low-Versus High-Load Resistance Training. Asian J Sports Med 2016; 7:e29247. [PMID: 27625750 PMCID: PMC5003312 DOI: 10.5812/asjsm.29247] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 10/17/2015] [Accepted: 10/29/2015] [Indexed: 11/22/2022] Open
Abstract
Background It has been hypothesized that the ability to increase volume load (VL) via a progressive increase in the magnitude of load for a given exercise within a given repetition range could enhance the adaptive response to resistance training. Objectives The purpose of this study was to compare changes in volume load (VL) over eight weeks of resistance training (RT) in high-versus low-load protocols. Materials and Methods Eighteen well-trained men were matched according to baseline strength were randomly assigned to either a low-load RT (LOW, n = 9) where 25 - 35 repetitions were performed per exercise, or a high-load RT (HIGH, n = 9) where 8 - 12 repetitions were performed per exercise. Both groups performed three sets of seven exercises for all major muscles three times per week on non-consecutive days. Results After adjusting for the pre-test scores, there was a significant difference between the two intervention groups on post-intervention total VL with a very large effect size (F (1, 15) = 16.598, P = .001, ηp2 = .525). There was a significant relationship between pre-intervention and post-intervention total VL (F (1, 15) = 32.048, P < .0001, ηp2 = .681) in which the pre-test scores explained 68% of the variance in the post-test scores. Conclusions This study indicates that low-load RT results in greater accumulations in VL compared to high-load RT over the course of 8 weeks of training.
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Affiliation(s)
- Brad J. Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, USA
- Corresponding author: Brad J. Schoenfeld, Department of Health Sciences, CUNY Lehman College, Bronx, USA. Tel: +1-7189601999, Fax: +1-7189601999, E-mail:
| | | | - Bret Contreras
- Sport Performance Research Institute, Auckland University of Technology, Auckland, New Zealand
| | - Tom Cappaert
- Rocky Mountain University of Health Professionals, Provo, USA
| | - Alex Silva Ribeiro
- Group of Study and Research in Metabolism, Nutrition, and Exercise, Londrina State University, Londrina, Brazil
| | - Brent A. Alvar
- Rocky Mountain University of Health Professionals, Provo, USA
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Schoenfeld BJ, Contreras B, Vigotsky AD, Ogborn D, Fontana F, Tiryaki-Sonmez G. Upper body muscle activation during low-versus high-load resistance exercise in the bench press. ISOKINET EXERC SCI 2016. [DOI: 10.3233/ies-160620] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Brad J. Schoenfeld
- Department of Health Sciences, Program of Exercise Science, CUNY Lehman College, Bronx, NY, USA
| | - Bret Contreras
- Sport Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand
| | | | - Dan Ogborn
- School of Rehabilitation Science, McMaster University, Hamilton, ON, Canada
| | - Fabio Fontana
- School of Health, Physical Education, and Leisure Services, University of Northern Iowa, Cedar Falls, IA, USA
| | - Gul Tiryaki-Sonmez
- Department of Health Sciences, Program of Exercise Science, CUNY Lehman College, Bronx, NY, USA
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Schoenfeld BJ, Ogborn D, Krieger JW. Dose-response relationship between weekly resistance training volume and increases in muscle mass: A systematic review and meta-analysis. J Sports Sci 2016; 35:1073-1082. [PMID: 27433992 DOI: 10.1080/02640414.2016.1210197] [Citation(s) in RCA: 310] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Schoenfeld BJ, Peterson MD, Ogborn D, Contreras B, Sonmez GT. Effects of Low- vs. High-Load Resistance Training on Muscle Strength and Hypertrophy in Well-Trained Men. J Strength Cond Res 2016; 29:2954-63. [PMID: 25853914 DOI: 10.1519/jsc.0000000000000958] [Citation(s) in RCA: 238] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The purpose of this study was to compare the effect of low- versus high-load resistance training (RT) on muscular adaptations in well-trained subjects. Eighteen young men experienced in RT were matched according to baseline strength and then randomly assigned to 1 of 2 experimental groups: a low-load RT routine (LL) where 25-35 repetitions were performed per set per exercise (n = 9) or a high-load RT routine (HL) where 8-12 repetitions were performed per set per exercise (n = 9). During each session, subjects in both groups performed 3 sets of 7 different exercises representing all major muscles. Training was performed 3 times per week on nonconsecutive days, for a total of 8 weeks. Both HL and LL conditions produced significant increases in thickness of the elbow flexors (5.3 vs. 8.6%, respectively), elbow extensors (6.0 vs. 5.2%, respectively), and quadriceps femoris (9.3 vs. 9.5%, respectively), with no significant differences noted between groups. Improvements in back squat strength were significantly greater for HL compared with LL (19.6 vs. 8.8%, respectively), and there was a trend for greater increases in 1 repetition maximum (1RM) bench press (6.5 vs. 2.0%, respectively). Upper body muscle endurance (assessed by the bench press at 50% 1RM to failure) improved to a greater extent in LL compared with HL (16.6 vs. -1.2%, respectively). These findings indicate that both HL and LL training to failure can elicit significant increases in muscle hypertrophy among well-trained young men; however, HL training is superior for maximizing strength adaptations.
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Affiliation(s)
- Brad J Schoenfeld
- 1Department of Health Sciences, CUNY Lehman College, Bronx, New York; 2Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, Michigan; 3Neuromuscular and Neurometabolic Unit, McMaster University Medical Center, Hamilton, Ontario, Canada; and 4Sport Performance Research Institute New Zealand, AUT University, Auckland, New Zealand
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18
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Schoenfeld B, Contreras B, Ogborn D, Galpin A, Krieger J, Sonmez G. Effects of Varied Versus Constant Loading Zones on Muscular Adaptations in Trained Men. Int J Sports Med 2016; 37:442-7. [DOI: 10.1055/s-0035-1569369] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- B. Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, United States
| | - B. Contreras
- Sport Performance Research Institute, Aukland University of Technology, Aukland, New Zealand
| | - D. Ogborn
- Health Sciences, McMaster University, W. Hamilton, Canada
| | - A. Galpin
- Neuromuscular and Neurometabolic Unit, Cal State Fullerton, Fullerton, United States
| | - J. Krieger
- Weightology.net, Issaquah, United States
| | - G. Sonmez
- Department of Health Sciences, CUNY Lehman College, Bronx, United States
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Vigotsky AD, Ogborn D, Phillips SM. Motor unit recruitment cannot be inferred from surface EMG amplitude and basic reporting standards must be adhered to. Eur J Appl Physiol 2015; 116:657-8. [PMID: 26705245 DOI: 10.1007/s00421-015-3314-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/10/2015] [Indexed: 10/22/2022]
Abstract
The study by Jenkins et al. attempted to elucidate the mechanisms behind the findings of Mitchell et al. (J Appl Physiol 113(1):71-77, 2012). However, we believe the work of Jenkins et al. contains methodological issues, does not meet electromyographic reporting standards, and deduces conclusions beyond which can be interpreted from the data provided.
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Affiliation(s)
| | - Dan Ogborn
- McMaster University, Hamilton, ON, Canada
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Zykovich A, Hubbard A, Flynn JM, Tarnopolsky M, Fraga MF, Kerksick C, Ogborn D, MacNeil L, Mooney SD, Melov S. Genome-wide DNA methylation changes with age in disease-free human skeletal muscle. Aging Cell 2014; 13:360-6. [PMID: 24304487 PMCID: PMC3954952 DOI: 10.1111/acel.12180] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/23/2013] [Indexed: 12/11/2022] Open
Abstract
A decline in skeletal muscle mass and function with aging is well recognized, but remains poorly characterized at the molecular level. Here, we report for the first time a genome-wide study of DNA methylation dynamics in skeletal muscle of healthy male individuals during normal human aging. We predominantly observed hypermethylation throughout the genome within the aged group as compared to the young subjects. Differentially methylated CpG (dmCpG) nucleotides tend to arise intragenically and are underrepresented in promoters and are overrepresented in the middle and 3′ end of genes. The intragenic methylation changes are overrepresented in genes that guide the formation of the junction of the motor neuron and myofibers. We report a low level of correlation of gene expression from previous studies of aged muscle with our current analysis of DNA methylation status. For those genes that had both changes in methylation and gene expression with age, we observed a reverse correlation, with the exception of intragenic hypermethylated genes that were correlated with an increased gene expression. We suggest that a minimal number of dmCpG sites or select sites are required to be altered in order to correlate with gene expression changes. Finally, we identified 500 dmCpG sites that perform well in discriminating young from old samples. Our findings highlight epigenetic links between aging postmitotic skeletal muscle and DNA methylation.
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Affiliation(s)
- Artem Zykovich
- Buck Institute for Research on Aging 8001 Redwood BlvdNovato CA 94945 USA
| | - Alan Hubbard
- Division of Biostatistics School of Public Health University of California 101 Haviland Hall MC 7358 Berkeley CA 94720 USA
| | - James M. Flynn
- Buck Institute for Research on Aging 8001 Redwood BlvdNovato CA 94945 USA
| | - Mark Tarnopolsky
- Neuromuscular and Neurometabolic Unit, Rm. 2H26 McMaster Children's Hospital McMaster University Medical Center 1200 Main St. W. Hamilton Ontario Canada L8N 3Z5
| | - Mario F. Fraga
- Cancer Epigenetics Laboratory Department of Immunology and Oncology Centro Nacional de Biotecnología/CNB‐CSIC Instituto Universitario de Oncología del Principado de Asturias (IUOPA) HUCA Universidad de Oviedo 33006Oviedo Spain
| | - Chad Kerksick
- Department of Health, Exercise and Sport Sciences University of New Mexico Albuquerque NM 87109 USA
| | - Dan Ogborn
- Neuromuscular and Neurometabolic Unit, Rm. 2H26 McMaster Children's Hospital McMaster University Medical Center 1200 Main St. W. Hamilton Ontario Canada L8N 3Z5
| | - Lauren MacNeil
- Neuromuscular and Neurometabolic Unit, Rm. 2H26 McMaster Children's Hospital McMaster University Medical Center 1200 Main St. W. Hamilton Ontario Canada L8N 3Z5
| | - Sean D. Mooney
- Buck Institute for Research on Aging 8001 Redwood BlvdNovato CA 94945 USA
| | - Simon Melov
- Buck Institute for Research on Aging 8001 Redwood BlvdNovato CA 94945 USA
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