Hypertrophy-type Resistance Training Improves Phase Angle in Young Adult Men and Women.

The main purpose of the present study was to investigate the effect of a hypertrophy-type resistance training protocol on phase angle, an indicator of cellular integrity, in young adult men and women. 28 men (22.2 ±4.3 years, 67.8 ±9.0 kg and 174.2 ±6.8 cm) and 31 women (23.2 ±4.1 years, 58.7 ±12.1 kg and 162.7 ± 6.4cm) underwent a progressive RT for 16 weeks (2 phases, 8 weeks each), 3 times per week, consisting of 10 to 12 whole body exercises with 3 sets of 8-12 repetitions maximum. Phase angle, resistance, reactance and total body water (int-ra and extracellular water compartments) were assessed by bioimpedance spectroscopy (Xitron 4200 Bioimpedance Spectrum Analyzer). Total body water, intracellular water and phase angle increased significantly (P<0.05) in men (7.8,8.3, and 4.3 %, respectively) and women (7.6,11.7, and 5.8 % respectively), with no significant difference between sexes (P>0.05). Bioimpedance resistance decreased (P<0.05) similarly in both sex (men = -4.8%, women = -3.8%). The results suggest that regardless of sex, progressive RT induces an increase in phase angle and a rise in cellular hydration. [ABSTRACT FROM AUTHOR]