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Medicina dello Sport 2019 December;72(4):616-27
DOI: 10.23736/S0025-7826.19.03402-1
Copyright © 2019 EDIZIONI MINERVA MEDICA
language: English, Italian
Effect of walk training with blood flow restriction on oxygen uptake kinetics, maximum oxygen uptake and muscle strength in middle-aged adults
Adalberto FERREIRA Jr 1, 2 ✉, Amanda C. de ARAÚJO 1, Patricia CHIMIN 2, Nilo M. OKUNO 1
1 Department of Physical Education, Ponta Grossa State University (UEPG), Ponta Grossa, Brazil; 2 Sport and Physical Education Center, Londrina State University (UEL), Londrina, Brazil
BACKGROUND: The aim of this study was to investigate the effects of six weeks of walk training with and without blood flow restriction (BFR) on oxygen uptake (VO2) on- and off-kinetics, maximal oxygen uptake (VO2max) and muscular strength middle-aged men.
METHODS: Twenty-six men (51.9±3.5 years; 80.4±10.9 kg; 167.9±6.1 cm) were divided into two training groups; walk training groups with (BFR-W; N.=14) and without (NOR-W; N.=12) BFR. Before and after training, all subjects underwent body composition evaluation, incremental test, three constant loads and one repetition maximum (1RM) tests. The intervention consisted of an interval training during 6 weeks (3 times/week, totalizing 18 sessions).
RESULTS: The VO2max and VO2 on-kinetics were improved only for BFR-W group after training (VO2max: pre = 27.37±2.91 mL/kg/min vs. post = 30.43±2.77 mL/kg/min; τon pre = 30.0±5.8 s vs. τon post = 25.8±4.8 s) (P<0.01). The VO2 off-kinetics improved for both the groups after training (P<0.01). Only BFR-W group increased muscle strength after training (1RM: pre = 127.7±19.3 kg vs. post = 137.6±23.6 kg) (P<0.01).
CONCLUSIONS: This study demonstrates that walk training with BFR improved aerobic fitness and muscular strength in middle-aged men. Thus, walk training with BFR seems to be an interesting alternative to prevent weak muscle strength and the decrease in aerobic fitness.
KEY WORDS: Exercise; Blood circulation; Cardiovascular system; Athletic performance