Effects of Different Resistance Training Frequencies on Body Composition, Cardiometabolic Risk Factors, and Handgrip Strength in Overweight and Obese Women: A Randomized Controlled Trial.

Autor:	Campa F; Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy., Maietta Latessa P; Department for Life Quality Studies, University of Bologna, 47921 Rimini, Italy., Greco G; Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70121 Bari, Italy., Mauro M; Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Study of Bari, 70121 Bari, Italy., Mazzuca P; Unit of Internal Medicine, Diabetes and Metabolic Disease Center, Romagna Health District, 47921 Rimini, Italy., Spiga F; Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy., Toselli S; Department of Biomedical and Neuromotor Sciences, University of Bologna, 40126 Bologna, Italy.
Jazyk:	angličtina
Zdroj:	Journal of functional morphology and kinesiology [J Funct Morphol Kinesiol] 2020 Jul 17; Vol. 5 (3). Date of Electronic Publication: 2020 Jul 17.
DOI:	10.3390/jfmk5030051
Abstrakt:	Background: Resistance training improves health in obese and overweight people. However, it is not clear what is the optimal weekly resistance training frequency and the most efficacious training protocol on body composition, cardiometabolic risk factors, and handgrip strength (HS). The aim of this study was to determine the effects of a supervised structured 24 week resistance training program on obese and overweight women. Methods: Forty-five women (BMI 37.1 ± 6.3 kg/m 2 ; age 56.5 ± 0.7 years) were randomly assigned to one of two groups: A group with a high weekly training frequency of three times a week (HIGH) and a group that performed it only once a week (LOW). Cardiometabolic risk factors, anthropometric and HS measures were taken before and after the intervention period. Results: A significant ( p < 0.05) group by time interaction was observed for body weight, body mass index, waist circumference, fat mass, plasma glucose, plasma insulin, homeostatic model assessment, and for dominant and absolute HS. Additionally, only the HIGH group saw increased HS and decreased total cholesterol and LDL-cholesterol after the intervention period ( p < 0.05). The observed increase in HS was associated with an improved insulin resistance sensitivity (absolute handgrip strength: r = -0.40, p = 0.007; relative handgrip strength: r = -0.47, p = 0.001) after training, which constitutes an essential element for cardiovascular health. Conclusions: The results suggest that high weekly frequency training give greater benefits for weight loss and cardiometabolic risk factors improvement than a training program with a training session of once a week. Furthermore, the improvement of HS can be achieved with a high weekly frequency training.
Databáze:	MEDLINE
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