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Published on: July 5, 2017
Effects of detraining after blood flow-restricted low-intensity concentric or eccentric training on muscle size and
Tomohiro Yasuda1, Jeremy P Loenneke, Robert S Thiebaud
1Department of Ischemic Circulatory Physiology, Graduate School of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan, yasuda-tomohiro@umin.ac.jp.
Abstract:
We investigated the effects of 6 weeks of detraining on muscle size and strength in young men who had previously participated in 6 weeks (3 days/week) of 30 % of concentric one-repetition maximal (1-RM) dumbbell curl training [one arm: concentric blood flow restricted (BFR) exercise (CON-BFR); the other arm: eccentric BFR exercise (ECC-BFR)]. MRI-measured muscle cross-sectional area (CSA) at 10 cm above the elbow joint increased from pre to post (p < 0.01), and the muscle CSA following detraining remained greater than pre (p < 0.01) but was similar to that observed at post. Maximal voluntary contraction (MVC) increased from pre to post (p < 0.05), and the MVC following detraining remained greater than pre (p < 0.05) but was similar to that observed at post. The ECC-BFR did not produce any changes across time. Increased muscle strength following 6 weeks of CON-BFR was well preserved at 6 weeks of detraining, which may be primarily related to muscle hypertrophy.
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