Abstract |
To investigate the efficacy of ischemia in strength training with low mechanical stress, tourniquet ischemia was utilized in low- resistance training. Five untrained subjects conducted one-legged isometric knee extension training with one leg ischemic (I-leg) and the other non-ischemic (NI-leg). Repeated isometric contractions for 2 s with 3 s relaxation in between were continued for 3 min and conducted 3 days/week for 4 weeks as training. Training resistance was 40% of maximal voluntary contraction (MVC) of respective leg and tourniquet ischemia was applied during I-leg training. MVC in I-leg after 2 weeks (9% gain) and 4 weeks (26% gain) were significantly higher than pre-training value (p < 0.05). A significant increase in maximal rate of torque development in I-leg was observed after 4 weeks (p < 0.05). On the contrary, there was no significant changes in either of the parameters in NI-leg. As a consequence, the differences between legs for both parameters were significant after 2 and 4 weeks (p < 0.05 or p < 0.01). The substantial gain in strength and maximal rate of torque development in I-leg demonstrated the efficacy of tourniquet ischemia during low- resistance training of short duration, and suggested the importance of neuromuscular and/or metabolic activity, other than high mechanical stress, to the adapting responses to strength training.
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Authors | M Shinohara, M Kouzaki, T Yoshihisa, T Fukunaga |
Journal | European journal of applied physiology and occupational physiology
(Eur J Appl Physiol Occup Physiol)
Vol. 77
Issue 1-2
Pg. 189-91
( 1998)
ISSN: 0301-5548 [Print] Germany |
PMID | 9459541
(Publication Type: Journal Article)
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Topics |
- Adult
- Exercise
- Humans
- Ischemia
- Isometric Contraction
- Leg
(blood supply)
- Male
- Muscle Fatigue
(physiology)
- Stress, Mechanical
- Tourniquets
- Weight-Bearing
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