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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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EFFECTS OF LOW-INTENSITY CYCLE TRAINING WITH RESTRICTED LEG BLOOD FLOW ON THIGH MUSCLE VOLUME AND VO2MAX IN YOUNG MEN |
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Takashi Abe1  , Satoshi Fujita1, Toshiaki Nakajima2, Mikako Sakamaki1, Hayao Ozaki1, Riki Ogasawara1, Masato Sugaya1, Maiko Kudo3, Miwa Kurano2, Tomohiro Yasuda1,
Yoshiaki Sato2, Hiroshi Ohshima4, Chiaki Mukai4 and Naokata Ishii3 |
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1Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Japan, 2Graduate School of Medicine, University of Tokyo, Tokyo, Japan, 3Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan, 4Japan Aerospace Exploration Agency, Tsukuba, Japan |
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© Journal of Sports Science and Medicine (2010) 9, 452 - 458 |
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| ABSTRACT | |||
| Concurrent improvements in aerobic capacity and muscle hypertrophy
in response to a single mode of training have not been reported. We examined
the effects of low-intensity cycle exercise training with and without blood
flow restriction (BFR) on muscle size and maximum oxygen uptake (VO2max).
A group of 19 young men (mean age ± SD: 23.0 ± 1.7 years) were allocated
randomly into either a BFR-training group (n=9, BFR-training) or a non-BFR
control training group (n=10, CON-training), both of which trained 3 days/wk
for 8 wk. Training intensity and duration were 40% of VO2max
and 15 min for the BFR-training group and 40% of VO2max and 45
min for the CON-training group. MRI-measured thigh and quadriceps muscle
cross-sectional area and muscle volume increased by 3.4-5.1% (P < 0.01)
and isometric knee extension strength tended to increase by 7.7% (p <
0.10) in the BFR-training group. There was no change in muscle size (~0.6%)
and strength (~1.4%) in the CON-training group. Significant improvements
in VO2max (6.4%) and exercise time until exhaustion (15.4%) were
observed in the BFR-training group (p < 0.05) but not in the CON-training
group (-0.1 and 3. 9%, respectively). The results suggest that low-intensity,
short-duration cycling exercise combined with BFR improves both muscle hypertrophy
and aerobic capacity concurrently in young men.
Key words: Muscle hypertrophy, Aerobic exercise, Occlusion, Muscle strength. |
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