Effects of detraining after blood flow-restricted low-intensity training on muscle size and strength in older adults
Tomohiro Yasuda1, Kazuya Fukumura, Yoshiaki Sato
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.
Background:
Although blood flow-restricted low-intensity resistance training (BFR-RT) increases muscle size and strength in older adults, the effect of detraining on muscle adaptation is unclear.
Methods:
We investigated the effects of 24 weeks of detraining on thigh muscle cross-sectional area (CSA) and one-repetition maximum strength (1-RM) in older adults who had previously participated in 12 weeks of training (BFR-RT, 20-30 % 1-RM, knee extension and leg press) or non-BFR training.
Results:
Both 1-RM and relative dynamic strengths (1-RM divided by quadriceps femoris (QF) muscle CSA) were higher at both post-training and detraining than at pre-training for the BFR-RT group (p < 0.05). QF muscle CSA was higher at only post-training than at pre-training for the BFR-RT group (p < 0.01).
Conclusion:
Increased muscle strength following 12 weeks of training with BFR-RT was well preserved at 24 weeks of detraining, which is due mainly to neural adaptation in older adults.
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