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Muscle strength and power changes during maximal isokinetic training
Medicine and Science in Sports
|January 1, 1978
Summary
High-intensity, short-duration training significantly enhances skeletal muscle strength and reduces fatigue. Both 6-second and 30-second training bouts improved peak torque and work output in knee extensors and flexors.
Area of Science:
- Sports Medicine
- Exercise Physiology
- Skeletal Muscle Physiology
Background:
- High-intensity training is crucial for athletic performance.
- Understanding optimal training durations for skeletal muscle adaptation is essential.
Purpose of the Study:
- To investigate the effects of short-duration, high-intensity isokinetic training on skeletal muscle.
- To compare the efficacy of 6-second versus 30-second training bouts on muscle strength and fatiguability.
Main Methods:
- Isokinetic dynamometry was used to assess knee extensors and flexors.
- Subjects underwent 7 weeks of training, 4 times/week, with either 6-sec or 30-sec exercise bouts.
- Peak torque, total work output, and muscular fatiguability were measured before and after training.
Main Results:
- Both 6-sec and 30-sec training durations significantly increased peak muscular torque (P < .05).
- Total work output increased by approximately 30% with training at both slow (60°/sec) and fast (180°/sec) velocities.
- Both training protocols significantly reduced knee extensor muscle fatiguability.
Conclusions:
- Short-duration, high-intensity isokinetic training effectively enhances skeletal muscle strength and endurance.
- Training duration (6-sec vs. 30-sec) did not differentially impact strength gains or work output.
- Training velocity is a key factor in improving peak torque and reducing muscle fatigue.