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Isometric torso rotation strength: effect of training frequency on its development
P L DeMichele1, M L Pollock, J E Graves
1Center for Exercise Science, College of Health and Human Performance, College of Medicine, University of Florida, Gainesville 32510, USA.
Archives of Physical Medicine and Rehabilitation
|January 1, 1997
Summary
Training torso rotation muscles twice weekly is recommended for optimal strength gains. Training three times weekly showed no additional benefit over twice-weekly sessions for improving isometric strength.
Area of Science:
- Exercise Physiology
- Muscle Strength Training
- Biomechanics
Background:
- Torso rotation strength is crucial for athletic performance and daily activities.
- Optimal training frequency for developing torso rotation muscle strength is not well-established.
- Previous research has not definitively determined the most effective training regimen for rotary torso strength.
Purpose of the Study:
- To investigate the impact of different training frequencies on isometric (IM) torso rotation strength.
- To identify the most effective training schedule for enhancing rotary torso muscle power.
- To compare the strength improvements resulting from training once, twice, or three times per week.
Main Methods:
- A pretest-posttest randomized-group design was employed.
- 58 healthy adults (33 men, 25 women) participated.
- Participants were assigned to control, train once/week, twice/week, or thrice/week groups for 12 weeks, performing variable resistance exercises.
Main Results:
- Training once a week did not significantly improve IM torso rotation strength compared to the control group.
- Training twice or three times a week resulted in significant strength increases across most measurement angles.
- No significant differences in strength were observed between the twice-weekly and thrice-weekly training groups.
Conclusions:
- Training the rotary torso muscles twice per week is sufficient for significant strength development.
- Increasing training frequency beyond twice per week did not yield additional improvements in isometric torso rotation strength.
- A twice-weekly training regimen is recommended for effectively enhancing torso rotation muscle strength.