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Kinetic analysis of complex training rest interval effect on vertical jump performance.
Randall L Jensen1, William P Ebben
1Physical Education Instruction Facility, Northern Michigan University, Marquette, Michigan 49855, USA. rajensen@nmu.edu
Journal of Strength and Conditioning Research
|May 14, 2003
Summary
Complex training, combining strength and plyometric exercises, does not significantly enhance jumping performance. Performing plyometrics immediately after strength training hinders performance, suggesting athletes should wait longer for optimal results.
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanics
Background:
- Complex training integrates strength and plyometric exercises.
- Research is divided on whether plyometrics are enhanced when performed after a strength training set, with some suggesting a 3-4 minute delay.
- Other studies show no complex training advantage when plyometrics follow immediately after strength training.
Purpose of the Study:
- To determine if complex training offers an ergogenic advantage.
- To identify the optimal recovery time between strength training and plyometrics for enhanced performance.
- To investigate the effects of complex training on vertical jump height and peak ground reaction forces.
Main Methods:
- 21 NCAA Division I athletes performed countermovement vertical jumps and 5-repetition maximum (5 RM) squats.
- Vertical jumps were measured at 10 seconds, 1, 2, 3, and 4 minutes post-squat.
- Jump height and peak ground reaction forces were recorded using a force platform.
Main Results:
- Jump performance was significantly hindered immediately after the squat exercise (0.66 m).
- Subsequent jumps (0.72-0.76 m) showed no significant difference compared to pre-squat performance (0.74 m).
- No significant effect on jump performance was observed between high and low strength individuals.
Conclusions:
- Complex training does not appear to significantly enhance jumping performance.
- Performing plyometrics immediately after strength training decreases jump performance.
- Athletes should avoid performing jumps immediately following resistance training to optimize performance; longer recovery periods may be beneficial.