Training load does not affect detraining's effect on muscle volume, muscle strength and functional capacity among older adults
Roie, E. V., Walker, S., Driessche, S. V., Baggen, R., Coudyzer, W., Bautmans, I., & Delecluse, C. (2017). Training load does not affect detraining's effect on muscle volume, muscle strength and functional capacity among older adults. Experimental Gerontology, 98, 30-37. https://doi.org/10.1016/j.exger.2017.07.017
Published inExperimental Gerontology
© 2017 Elsevier Inc. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.
Research underlines the potential of low-load resistance exercise in older adults. However, while the effects of detraining from high-load protocols have been established, it is not known whether gains from low-load training would be better/worse maintained. The current study evaluated the effects of 24 weeks of detraining that followed 12 weeks of high- and low-load resistance exercise in older adults. Fifty-six older adults (68.0 ± 5.0 years) were randomly assigned to leg press and leg extension training at either HIGH load (2 × 10–15 repetitions at 80% of one-repetition maximum (1-RM)), LOW load (1 × 80–100 repetitions at 20% of 1-RM), or LOW + load (1 × 60 repetitions at 20% of 1-RM, immediately followed by 1 × 10–20 repetitions at 40% 1-RM). All protocols ended with volitional fatigue. The main outcome measures included mid-thigh muscle volume, leg press 1-RM, leg extension isometric and isokinetic strength, and functional performance. Tests were performed at baseline, post-intervention and after 24 weeks of detraining. Results show no effect of load on preservation of muscle volume, which returned to baseline after detraining. Training-induced gains in functional capacity and isometric strength were maintained, independent of load. HIGH and LOW + were more beneficial than LOW for long-lasting gains in training-specific 1-RM. To conclude, gains in muscle volume are reversed after 24 weeks of detraining, independent of load. This emphasises the need for long-term resistance exercise adherence. The magnitude of detraining in neuromuscular and functional adaptations was similar between groups. These findings underline the value of low-load resistance exercise in older age. Clinical Trial Registration NCT01707017. ...
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