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Strength training effects on rearfoot motion in running
M E Feltner1, H S MacRae, P G MacRae
1Department of Sports Medicine and Physical Education, Pepperdine University, Malibu, CA 90263.
Medicine and Science in Sports and Exercise
|August 1, 1994
Summary
Isokinetic strength training for ankle inversion and eversion muscles effectively reduced excessive pronation in runners. This targeted approach improved muscle strength and running biomechanics, offering a potential solution for pronation-related issues.
Area of Science:
- Biomechanics
- Sports Medicine
- Exercise Physiology
Background:
- Excessive pronation during running can contribute to various lower limb injuries.
- Targeted muscle strengthening may offer a method to control excessive pronation.
- Isokinetic (IK) and nonisokinetic (NIK) training are common rehabilitation modalities.
Purpose of the Study:
- To investigate the effects of isokinetic (IK) and nonisokinetic (NIK) strength training programs on ankle inversion (INV) and eversion (EV) muscles.
- To determine the impact of these training programs on pronation during running.
Main Methods:
- Seventy-seven volunteers were assessed for running pronation (delta beta PRO).
- Eighteen subjects with high pronation underwent either IK or NIK training for 8 weeks.
- Muscle strength (concentric/eccentric) and running biomechanics were measured pre- and post-training.
Main Results:
- The IK group demonstrated significant increases in INV and EV muscle strength across various conditions.
- The IK group showed significant reductions in rearfoot angle, pronation/supination angles, and total pronation (delta beta PRO).
- The NIK group showed minimal strength improvements and no significant changes in running motion.
Conclusions:
- Isokinetic strength training for inversion and eversion muscles can effectively decrease excessive pronation during running.
- This training method shows promise for improving running biomechanics and potentially reducing injury risk.