Related Experiment Video
Updated: Apr 11, 2026
Improving Strength, Power, Muscle Aerobic Capacity, and Glucose Tolerance through Short-term Progressive Strength Training Among Elderly People
Published on: July 5, 2017
Muscle quality index and phase angle responses to matched-volume resistance training at different frequencies in
Matheus Amarante do Nascimento1,2,3, Ágatha Graça2,3,4, Higor Santos Fonseca1,2,3,4
1Paraná State University - Unespar, Paranavaí Campus, Department of Physical Education, Paranavaí, PR, Brazil.
Purpose:
To compare the effects of two resistance training (RT) frequencies (two vs. three sessions per week) on phase angle (PhA), a bioimpedance-derived marker, and muscle quality index (MQI) in older women under matched weekly training volume.
Methods:
Forty-five older women (G2x: n = 22; G3x: n = 23; 63.2 ± 4.5 years) completed 12 weeks of supervised RT. Outcomes included fat mass, FFM, resting metabolic rate, total body water, PhA, and MQI, calculated as one-repetition maximum (1RM) divided by the corresponding segment-specific fat-free mass (FFM) measured by DXA for the chest press, leg extension, and preacher curl exercises. This study represents a secondary analysis of data from a previously published trial, focusing on neuromuscular efficiency and PhA.
Results:
MQI increased significantly over time in both groups (p < 0.001), with no time × group interactions observed across exercises. No group-level changes were detected for PhA, and mean fluctuations remained below the minimal detectable change. Fat mass decreased modestly in the 3×/week group, whereas FFM increased slightly in both groups.
Conclusion:
When weekly training volume was equated, RT performed two or three times per week resulted in similar improvements in MQI, with no group-level changes observed for PhA in older women.
More Related Videos
08:48Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis
Published on: January 29, 2016
07:44Construction of Constant-Load (Isotonic) and Constant-Velocity (Isokinetic) Torque-Velocity-Power Profiles In vivo for the Rat Plantar Flexors
Published on: October 3, 2025
Related Concept Videos
01:22Muscle Stimulation Frequency
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
01:27Exercise and Muscle Performance
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...