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Validity and reliability of a medicine ball explosive power test
B A Stockbrugger1, R G Haennel
1Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada S4S 0A2.
Journal of Strength and Conditioning Research
|December 1, 2001
Summary
The medicine ball throw test accurately measures explosive power in athletes. This study found it to be a valid and reliable assessment tool for athletic performance.
Area of Science:
- Sports Science
- Biomechanics
- Human Movement Analysis
Background:
- Assessing explosive power is crucial for athletic performance.
- Existing tests may not fully capture total-body explosive movements.
- A need exists for valid and reliable field tests.
Purpose of the Study:
- To determine the validity and reliability of a medicine ball throw test.
- To assess its effectiveness in measuring explosive power.
- To compare it with a standard countermovement vertical jump.
Main Methods:
- Twenty competitive sand volleyball players participated.
- Medicine ball throw and countermovement vertical jump tests were performed.
- Tests were repeated across two sessions to assess reliability.
Main Results:
- A strong correlation (r = 0.906) was found between medicine ball throw distance and vertical jump power index.
- High test-retest reliability was observed for both the countermovement vertical jump (r = 0.993) and medicine ball throw (r = 0.996).
Conclusions:
- The medicine ball throw test is a valid measure of explosive power.
- It demonstrates excellent reliability for assessing athletic performance.
- This test offers a reliable method for evaluating total-body explosive movements.