Improvements in Phase Angle are Related With Muscle Quality Index After Resistance Training in Older Women.

Improvements in Phase Angle are Related With Muscle Quality Index After Resistance Training in Older Women. J Aging Phys Act. 2018 Dec 03;:1-19 Authors: Nunes JP, Ribeiro AS, Silva AM, Schoenfeld BJ, Dos Santos L, Cunha PM, Nascimento MA, Tomeleri CM, Nabuco HCG, Antunes M, Cyrino LT, Cyrino ES Abstract The aim of this study was to analyze the association between muscle quality index (MQI) and phase angle (PhA) after a program of progressive resistance training (RT) in older women. Sixty-six older women with previous RT experience (68.8 ± 4.6 years, 156.6 ± 5.3 cm, 66.0 ± 13.0 kg, 26.7 ± 4.6 kg/m²) underwent 12 weeks of RT (3 x/week, 8 exercises, 10-15 RM). Anthropometry, muscular strength (1RM tests), and body composition (DXA and spectral bioimpedance) were measured pre- and post-training. There were observed significant increase was observed for PhA, MQI, muscular strength, muscle mass, and reactance whereas no significant changes in body fat and resistance were found. A significant correlation was observed between the RT-induced relative changes in PhA and MQI (r = 0.620). We conclude that improvements in MQI induced by RT are associated with increases in PhA. Therefore, PhA may be a valid tool to track changes in MQI after 12 weeks of RT in older women. PMID: 30507279 [PubMed - as supplied by publisher]
Source: Journal of Aging and Physical Activity - Category: Geriatrics Tags: J Aging Phys Act Source Type: research