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Reliability of the Dynamic Strength Index in College Athletes.
- Source :
- International Journal of Sports Physiology & Performance; Jul2015, Vol. 10 Issue 5, p542-545, 4p, 1 Chart
- Publication Year :
- 2015
-
Abstract
- Purpose: To determine the reliability of the Dynamic Strength Index (DSI) in college athletes. Method: Nineteen male college athletes performed the squat jump (SJ) and isometric midthigh pull (IMTP) to determine peak force, on 2 separate days. Reliability was assessed by intraclass correlation coefficient (ICC), typical error (TE), percentage change in the mean, smallest worthwhile change (SWC), and coefficient of variation (%CV). Results: Peak force for the SJ was 2137 ± 499 N and 2781 ± 435 N for the IMTP, resulting in a mean DSI of 0.78 ± 0.19. Peak forces in the SJ (ICC = .99, TE = 57.22 N, change in mean = 0.2%, SWC = 4.7%, CV = 2.6%) and IMTP (ICC = .95, TE = 104.22 N, change in mean = 0.5%, SWC = 3.1%, CV = 3.8%) were considered highly reliable between sessions. However, IMTP peak force was the only variable with an overall TE <SWC. The DSI was also highly reliable (ICC = .97, TE = 0.03, change in mean = -0.3%, SWC = 5.1%, CV = 4.6%) between sessions. Conclusion: This study demonstrates that peak force in the SJ and IMTP are reliable, resulting in a reliable assessment of dynamic-force-production capabilities via the DSI. The DSI may be used to guide individualized training interventions and monitor specific adaptations to training. Changes in SJ peak force, IMTP peak force, and DSI were >4.67%, 3.13%, and 5.13%, respectively, identifying meaningful changes in response to training or competition. [ABSTRACT FROM AUTHOR]
- Subjects :
- LEG physiology
ISOMETRIC exercise
ANTHROPOMETRY
BIOPHYSICS
COLLEGE athletes
EXERCISE physiology
GROUND reaction forces (Biomechanics)
JUMPING
RESEARCH methodology
MUSCLE strength testing
SCIENTIFIC apparatus & instruments
STATISTICS
T-test (Statistics)
BODY movement
INTER-observer reliability
RESEARCH methodology evaluation
EXERCISE intensity
DATA analysis software
DESCRIPTIVE statistics
Subjects
Details
- Language :
- English
- ISSN :
- 15550265
- Volume :
- 10
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- International Journal of Sports Physiology & Performance
- Publication Type :
- Academic Journal
- Accession number :
- 103585251
- Full Text :
- https://doi.org/10.1123/ijspp.2014-0255