Document Detail

Reliability of the Dynamic Strength Index in Collegiate Athletes.
MedLine Citation:
PMID:  25393233     Owner:  NLM     Status:  Publisher    
The purpose of this investigation was to determine the reliability of the Dynamic Strength Index (DSI) in collegiate athletes. Nineteen male collegiate athletes performed the squat jump (SJ) and isometric mid-thigh 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). 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 force in the SJ (ICC = 0.99; TE = 57.22 N; change in mean = 0.2%; SWC = 4.7%; CV = 2.6%) and IMTP (ICC = 0.95; 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 = 0.97; TE = 0.03; change in mean = -0.3%; SWC = 5.1%; CV = 4.6%) between sessions. 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 >4.67%, 3.13%, 5.13%, respectively, identify meaningful changes in response to training or competition.
Christopher Thomas; Paul A Jones; Paul Comfort
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-13
Journal Detail:
Title:  International journal of sports physiology and performance     Volume:  -     ISSN:  1555-0265     ISO Abbreviation:  Int J Sports Physiol Perform     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-13     Completed Date:  -     Revised Date:  2014-11-14    
Medline Journal Info:
Nlm Unique ID:  101276430     Medline TA:  Int J Sports Physiol Perform     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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