Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2010) 09, 452 - 458

Research article
Effects of Low-Intensity Cycle Training with Restricted Leg Blood Flow on Thigh Muscle Volume and VO2MAX in Young Men
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, Naokata Ishii3
Author Information
1 Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, Japan
2 Graduate School of Medicine, University of Tokyo, Tokyo, Japan
3 Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan
4 Japan Aerospace Exploration Agency, Tsukuba, Japan

Takashi Abe
✉ Graduate School of Frontier Sciences, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan 227-8563
Email: abe@k.u-tokyo.ac.jp
Publish Date
Received: 25-04-2010
Accepted: 07-06-2010
Published (online): 01-09-2010
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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


           Key Points
  • Concurrent improvements in aerobic capacity and muscle hypertrophy in response to a single mode of training have not been reported.
  • In the present study, low-intensity (40% of VO2max) cycle training with BFR can elicit concurrent improvement in muscle hypertrophy and aerobic capacity.
 
 
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