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Effects of Different Resistance Training Loads on the Muscle Quality Index in Older Women.
J Strength Cond Res. 2020 Jun 17 [Online ahead of print]JS

Abstract

Ribeiro, AS, Picoloto, A, Nunes, JP, Bezerra, ES, Schoenfeld, BJ, and Cyrino, ES. Effects of different resistance training loads on the muscle quality index in older women. J Strength Cond Res XX(X): 000-000, 2020-The purpose of this study was to investigate the effects of resistance training (RT) performed using low vs. moderate loads on muscular strength, muscle mass, and muscle quality index (MQI) in older women. Twenty-seven older women (71.5 ± 5 years, 65.2 ± 11 kg, 154.2 ± 5 cm, and 27.4 ± 4 kg·m) were randomized into 2 groups: one that performed RT with a low load (LOW, n = 13) and another that performed RT with a moderate load (MOD, n = 14). An 8-week RT program was performed 3 d·wk. Outcomes included 1-repetition maximum (1RM) tests and assessment of body composition by dual-energy X-ray absorptiometry. The LOW load consisted of a relative load at 15RM, whereas the MOD load consisted of a relative load at 10RM. Both groups presented significant changes from pre-training to post-training for chest press 1RM (LOW = 10.3%, and MOD = 11.1%), knee extension 1RM (LOW = 14.4%, and MOD = 16.6%), preacher curl 1RM (LOW = 12.4%, and MOD = 12.0%), fat-free mass (LOW = 2.1%, and MOD = 1.9%), body fat (LOW = -3.2%, and MOD = -2.7%), and MQI (LOW = 10.6%, and MOD = 11.3%). Results were similar (p > 0.05) between groups. These findings suggest that LOW and MOD loads are equally effective for promoting improvements in muscular strength and muscle growth as well as the MQI in older women.

Authors+Show Affiliations

Center for Research in Health Sciences, University of Northern Paraná, Londrina, PR, Brazil.Center for Research in Health Sciences, University of Northern Paraná, Londrina, PR, Brazil. Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, PR, Brazil.Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, PR, Brazil.Human Performance Laboratory, Federal University of Amazonas, Manaus, Brazil.Health Sciences Department, CUNY Lehman College, Bronx, New York.Metabolism, Nutrition, and Exercise Laboratory, Physical Education and Sport Center, Londrina State University, Londrina, PR, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32569120

Citation

Ribeiro, Alex S., et al. "Effects of Different Resistance Training Loads On the Muscle Quality Index in Older Women." Journal of Strength and Conditioning Research, 2020.
Ribeiro AS, Picoloto A, Nunes JP, et al. Effects of Different Resistance Training Loads on the Muscle Quality Index in Older Women. J Strength Cond Res. 2020.
Ribeiro, A. S., Picoloto, A., Nunes, J. P., Bezerra, E. S., Schoenfeld, B. J., & Cyrino, E. S. (2020). Effects of Different Resistance Training Loads on the Muscle Quality Index in Older Women. Journal of Strength and Conditioning Research. https://doi.org/10.1519/JSC.0000000000003667
Ribeiro AS, et al. Effects of Different Resistance Training Loads On the Muscle Quality Index in Older Women. J Strength Cond Res. 2020 Jun 17; PubMed PMID: 32569120.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of Different Resistance Training Loads on the Muscle Quality Index in Older Women. AU - Ribeiro,Alex S, AU - Picoloto,Alexandre, AU - Nunes,João Pedro, AU - Bezerra,Ewertton S, AU - Schoenfeld,Brad J, AU - Cyrino,Edilson S, Y1 - 2020/06/17/ PY - 2020/6/23/entrez PY - 2020/6/23/pubmed PY - 2020/6/23/medline JF - Journal of strength and conditioning research JO - J Strength Cond Res N2 - Ribeiro, AS, Picoloto, A, Nunes, JP, Bezerra, ES, Schoenfeld, BJ, and Cyrino, ES. Effects of different resistance training loads on the muscle quality index in older women. J Strength Cond Res XX(X): 000-000, 2020-The purpose of this study was to investigate the effects of resistance training (RT) performed using low vs. moderate loads on muscular strength, muscle mass, and muscle quality index (MQI) in older women. Twenty-seven older women (71.5 ± 5 years, 65.2 ± 11 kg, 154.2 ± 5 cm, and 27.4 ± 4 kg·m) were randomized into 2 groups: one that performed RT with a low load (LOW, n = 13) and another that performed RT with a moderate load (MOD, n = 14). An 8-week RT program was performed 3 d·wk. Outcomes included 1-repetition maximum (1RM) tests and assessment of body composition by dual-energy X-ray absorptiometry. The LOW load consisted of a relative load at 15RM, whereas the MOD load consisted of a relative load at 10RM. Both groups presented significant changes from pre-training to post-training for chest press 1RM (LOW = 10.3%, and MOD = 11.1%), knee extension 1RM (LOW = 14.4%, and MOD = 16.6%), preacher curl 1RM (LOW = 12.4%, and MOD = 12.0%), fat-free mass (LOW = 2.1%, and MOD = 1.9%), body fat (LOW = -3.2%, and MOD = -2.7%), and MQI (LOW = 10.6%, and MOD = 11.3%). Results were similar (p > 0.05) between groups. These findings suggest that LOW and MOD loads are equally effective for promoting improvements in muscular strength and muscle growth as well as the MQI in older women. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/32569120/Effects_of_Different_Resistance_Training_Loads_on_the_Muscle_Quality_Index_in_Older_Women_ L2 - https://doi.org/10.1519/JSC.0000000000003667 DB - PRIME DP - Unbound Medicine ER -
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