Higher Training Frequency Is Important for Gaining Muscular Strength Under Volume-Matched Training

Area of Science:

• Exercise Physiology
• Muscle Hypertrophy
• Strength Training

Background:

• Investigated the impact of varying strength training frequencies on muscle adaptations.
• Examined the effects of volume-matched training protocols on muscle size and strength.
• Assessed subsequent detraining effects following different training frequencies.

Purpose of the Study:

• To compare the efficacy of different training frequencies (1 vs. 3 sessions/week) in untrained individuals.
• To determine the optimal training frequency for maximizing muscle hypertrophy and strength gains.
• To evaluate the influence of training frequency on muscle fatigue and detraining outcomes.

Main Methods:

• Untrained subjects (n=20) participated in an 11-week knee-extension training program.
• Groups performed volume-matched training at one session/week (T1: 6x12 reps) or three sessions/week (T3: 2x12 reps).
• Measurements included rating of perceived exertion (RPE), muscle stiffness, thigh circumference, muscle thickness, and maximal voluntary contraction torque (MVC).

Main Results:

• T3 group reported significantly lower RPE than T1 group during training.
• Both groups showed significant increases in muscle size (thigh circumference, muscle thickness) and strength (MVC) after 11 weeks.
• T3 group achieved significantly greater MVC improvements (65.2%) compared to T1 group (43.5%); detraining led to muscle size decrease but not MVC.

Conclusions:

• Three weekly sessions with two sets are recommended for untrained individuals to enhance muscle strength and size.
• This higher frequency protocol effectively improves strength and muscle hypertrophy while minimizing training-induced fatigue.
• Muscle strength gains were more resilient to detraining compared to muscle size changes.