Comparisons Between Low-Intensity Resistance Training With Blood Flow Restriction and High-Intensity Resistance Training on Quadriceps Muscle Mass and Strength in Elderly.
Vechin, Felipe C. 1; Libardi, Cleiton A. 1,2,3; Conceicao, Miguel S. 2; Damas, Felipe R. 1; Lixandrao, Manoel E. 1; Berton, Ricardo P.B. 2; Tricoli, Valmor A.A. 1; Roschel, Hamilton A. 1; Cavaglieri, Claudia R. 2; Chacon-Mikahil, Mara Patricia T. 2; Ugrinowitsch, Carlos 1
Journal of Strength & Conditioning Research.
29(4):1071-1076, April 2015.
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Vechin, FC, Libardi, CA, Conceicao, MS, Damas, FR, Lixandrao, ME, Berton, RPB, Tricoli, VAA, Roschel, HA, Cavaglieri, CR, Chacon-Mikahil, MPT, and Ugrinowitsch, C. Comparisons between low-intensity resistance training with blood flow restriction and high-intensity resistance training on quadriceps muscle mass and strength in elderly. J Strength Cond Res 29(4): 1071-1076, 2015-High-intensity resistance training (HRT) has been recommended to offset age-related loss in muscle strength and mass. However, part of the elderly population is often unable to exercise at high intensities. Alternatively, low-intensity resistance training with blood flow restriction (LRT-BFR) has emerged. The purpose of this study was to compare the effects of LRT-BFR and HRT on quadriceps muscle strength and mass in elderly. Twenty-three elderly individuals, 14 men and 9 women (age, 64.04 /- 3.81 years; weight, 72.55 /- 16.52 kg; height, 163 /- 11 cm), undertook 12 weeks of training. Subjects were ranked according to their pretraining quadriceps cross-sectional area (CSA) values and then randomly allocated into one of the following groups: (a) control group, (b) HRT: 4 x 10 repetitions, 70-80% one repetition maximum (1RM), and (c) LRT-BFR: 4 sets (1 x 30 and 3 x 15 repetitions), 20-30% 1RM. The occlusion pressure was set at 50% of maximum tibial arterial pressure and sustained during the whole training session. Leg press 1RM and quadriceps CSA were evaluated at before and after training. A mixed-model analysis was performed, and the significance level was set at p <= 0.05. Both training regimes were effective in increasing pre- to post-training leg press 1RM (HRT: ~54%, p < 0.001; LRT-BFR: ~17%, p = 0.067) and quadriceps CSA (HRT: 7.9%, p < 0.001; LRT-BFR: 6.6%, p < 0.001); however, HRT seems to induce greater strength gains. In summary, LRT-BFR constitutes an important surrogate approach to HRT as an effective training method to induce gains in muscle strength and mass in elderly.
Copyright (C) 2015 by the National Strength & Conditioning Association.