Low-Load Resistance Training With Blood-Flow Restriction in Relation to Muscle Function, Mass, and Functionality in Women With Rheumatoid Arthritis.

ABSTRACT

OBJECTIVE: To evaluate the effects of a low-load resistance training program associated with partial blood-flow restriction in patients with rheumatoid arthritis (RA). METHODS: Forty-eight women with RA were randomized into 1 of 3 groups high-load resistance training (HL-RT; 70% 1 repetition maximum [1RM]), low-load resistance training (30% 1RM) with partial blood-flow restriction training (BFRT), and a control group. Patients completed a 12-week supervised training program and were assessed for lower-extremity 1RM, quadriceps cross-sectional area (CSA), physical function (timed-stands test [TST], timed-up-and-go test [TUG], and Health Assessment Questionnaire [HAQ]), and quality of life (Short Form 36 health survey [SF-36]) at baseline and after the intervention. RESULTS: BFRT and HL-RT were similarly effective in increasing maximum dynamic strength in both leg press (22.8% and 24.2%, respectively; P < 0.0001 for all) and knee extension (19.7% and 23.8%, respectively; P < 0.0001 for all). Quadriceps CSA was also significantly increased in both BFRT and HL-RT (9.5% and 10.8%, respectively; P < 0.0001 for all). Comparable improvements in TST (11.2% and 14.7%; P < 0.0001 for all) and TUG (-6.8% [P < 0.0053] and -8.7% [P < 0.0001]) were also observed in BFRT and HL-RT, respectively. Improvements in both groups were significantly greater than those of the control group (P < 0.05 for all). SF-36 role physical and bodily pain and HAQ scores were improved only in BFRT (45.7%, 22.5%, and -55.9%, respectively; P < 0.05 for all). HL-RT resulted in 1 case of withdrawal and several cases of exercise-induced pain, which did not occur in BFRT. CONCLUSION: BFRT was effective in improving muscle strength, mass, function, and health-related quality of life in patients with RA, emerging as a viable therapeutic modality in RA management.