Effect of resistance training with different frequencies and subsequent detraining on muscle mass and appendicular lean soft tissue,IGF-1, and testosterone in older women |
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| Authors: | Matheus Amarante Do Nascimento Aline Mendes Gerage Danilo Rodrigues Pereira Da Silva Alex Silva Ribeiro Daniel Gomes Da Silva Machado Fábio Luiz Cheche Pina |
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| Institution: | 1. Paranavaí Campus, Paraná State University – UNESPAR, Paranavaí, Paraná, Brazil;2. Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, Paraná, Brazil;3. Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, Paraná, Brazil;4. Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil;5. Center for Research in Health Science, University of Northern Paraná – UNOPAR, Londrina, Paraná, Brazil;6. Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil |
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| Abstract: | Objective: To analyse the effect of resistance training (RT) frequency on muscle mass, appendicular lean soft tissue, insulin-like growth factor 1 (IGF-1), testosterone, and their changes with detraining in older women. Methods: Forty-five physically independent older women (≥ 60?years) were randomly assigned to perform RT either two (G2X, n = 21) or three times/week (G3X, n = 24), during 12?weeks (8 exercises, 1 set of 10–15 repetition maximum). Muscle mass and appendicular lean soft tissue, IGF-1, testosterone, and dietary intake were measured at pre-training, post-training, and after detraining (12?weeks). Results: Muscle mass and appendicular lean soft tissue significantly increased post-training (G2X?=?+5.5% and G3X?=?+5.8%, P?P?P?Conclusion: We conclude that lower RT frequency is as effective as higher frequency to improve muscle mass and appendicular lean soft tissue, and to maintain testosterone and IGF-1. Additionally, detraining may reduce testosterone regardless of RT frequency. These results are specifically for community-dwelling older women and may not be generalized to other populations. |
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| Keywords: | Ageing strength body composition training |
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