Effects of blood-flow restricted exercise versus conventional resistance training in musculoskeletal disorders—a systematic review and meta-analysis

Stian Langgård Jørgensen1,2,3, Signe Kierkegaard-Brøchner2,3, Marie Bagger Bohn2, Mathias Høgsholt1,2, Per Aagaard4, Inger Mechlenburg3,5,6
1Department of Occupational and Physical Therapy, Horsens Regional Hospital, Horsens, Denmark
2H-HIP, Department of Occupational and Physical Therapy and Department of Orthopedic Surgery, Horsens Regional Hospital, Horsens, Denmark
3Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
4Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
5Department of Orthopedic Surgery, Aarhus University Hospital, Aarhus, Denmark
6Department of Public Health, Aarhus University, Aarhus, Denmark

Tóm tắt

To compare the effect of low-load blood flow restricted resistance training (BFR-RT) versus high-load resistance training (HL-RT) on muscle strength, muscle mass, physical function, patient-reported outcomes, and adherence to training in clinical musculoskeletal populations. Web of Science, Cochrane Central, Medline, Embase, SportDiscus was searched on the 30th May 2022. This study was conducted as a systematic review and meta-analysis. Randomized Controlled Trials (RCTs) were included if they (i) included patients, (ii) comprised of a BFR-RT intervention protocol and a group who performed HL-RT (≥ 70%1RM) for at least eight exercise sessions, and (iii) involved at least 1 exercise that targeted the lower limbs. The Cochrane Risk of Bias tool was used to evaluate the risk of bias. The meta-analyses were performed using a random effects model with an adjustment to the confidence interval. Seven RCTs comprising 303 participants (BFR-RT: n = 151; HL-RT: n = 152) were identified. HL-RT and BFR-RT showed similar gains in dynamic (1-10RM) knee extensor strength and leg press strength, quadriceps cross sectional area, sit-to-stand performance, and patient reported pain and function. There was a moderate effect favoring BFR-RT for increasing maximal isometric knee extensor strength. The grading of certainty in evidence was low-to-very low for all outcome variables. This systematic review and meta-analysis extends our current knowledge about BFR-RT and HL-RT as equally effective exercise methods for inducing gains in maximal muscle strength in healthy populations, by now also comprising patients suffering from various clinical musculoskeletal conditions. The certainty in the estimates was low-to-very low, prompting the inclusion of future higher-quality trials. PROSPERO ID (CRD42022337173). Registered June 18th 2022.

Tài liệu tham khảo

Appell HJ. Muscular atrophy following immobilization. A review. Sports Med. 1990;10(1):42–58.

Ferraz RB, Gualano B, Rodrigues R, Kurimori CO, Fuller R, Lima FR, DE Sá-Pinto AL, Roschel H. Benefits of Resistance Training with Blood Flow Restriction in Knee Osteoarthritis. Med Sci Sports Exerc. 2018;50(5):897–905. https://doi.org/10.1249/MSS.0000000000001530.

Grønfeldt BM, Lindberg Nielsen J, Mieritz RM, Lund H, Aagaard P. Effect of blood-flow restricted vs heavy-load strength training on muscle strength: Systematic review and meta-analysis. Scand J Med Sci Sports. 2020;30(5):837–48. https://doi.org/10.1111/sms.13632. Epub 2020 Feb 21.

Mortensen L, Mechlenburg I, Langgård Jørgensen S. Low-Load Blood-Flow-Restricted Exercise to Prevent Muscle Atrophy and Decline in Functional Performance in a Patient Recovering From a Malleolus Fracture. A Case Report. Clin J Sport Med. 2023;33(1):97–100. https://doi.org/10.1097/JSM.0000000000001072. Epub 2022 Oct 5.

Jørgensen SL, Bohn MB, Aagaard P, Mechlenburg I. Efficacy of low-load blood flow restricted resistance EXercise in patients with Knee osteoarthritis scheduled for total knee replacement (EXKnee): protocol for a multicentre randomised controlled trial. BMJ Open. 2020;10(10):e034376. https://doi.org/10.1136/bmjopen-2019-034376.

Cohen J. Statistical power analysis for the behavioral sciences (2nd ed.). Routledge: Academic press; 1988. https://doi.org/10.4324/9780203771587.

Pereira Neto EA, Bittar ST, Silva JC, Pfeiffer PA, Santos HH, Sousa MD. Walking with blood flow restriction improves the dynamic strength of women with osteoporosis. Rev Bras Med Esporte. 2018;24(2):135–9.