Document Detail

Relationship between countermovement jump performance and multijoint isometric and dynamic tests of strength.
MedLine Citation:
PMID:  18438251     Owner:  NLM     Status:  MEDLINE    
The purpose of this investigation was to determine the relationship between countermovement vertical jump (CMJ) performance and various methods used to assess isometric and dynamic multijoint strength. Twelve NCAA Division I-AA male football and track and field athletes (age, 19.83 +/- 1.40 years; height, 179.10 +/- 4.56 cm; mass, 90.08 +/- 14.81 kg; percentage of body fat, 11.85 +/- 5.47%) participated in 2 testing sessions. The first session involved 1 repetition maximum (1RM) (kg) testing in the squat and power clean. During the second session, peak force (N), relative peak force (N x kg(-1)), peak power (W), relative peak power (W x kg(-1)), peak velocity (m x s(-1)), and jump height (meters) in a CMJ, and peak force and rate of force development (RFD) (N x s(-1)) in a maximal isometric squat (ISO squat) and maximal isometric mid-thigh pull (ISO mid-thigh) were assessed. Significant correlations (P < or = 0.05) were found when comparing relative 1RMs (1RM/body mass), in both the squat and power clean, to relative CMJ peak power, CMJ peak velocity, and CMJ height. No significant correlations existed between the 4 measures of absolute strength, which did not account for body mass (squat 1RM, power clean 1RM, ISO squat peak force, and ISO mid-thigh peak force) when compared to CMJ peak velocity and CMJ height. In conclusion, multijoint dynamic tests of strength (squat 1RM and power clean 1RM), expressed relative to body mass, are most closely correlated with CMJ performance. These results suggest that increasing maximal strength relative to body mass can improve performance in explosive lower body movements. The squat and power clean, used in a concurrent strength and power training program, are recommended for optimizing lower body power.
James L Nuzzo; Jeffrey M McBride; Prue Cormie; Grant O McCaulley
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  22     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-06-06     Completed Date:  2008-08-07     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  699-707     Citation Subset:  IM    
Neuromuscular Laboratory, Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, North Carolina, USA.
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MeSH Terms
Cohort Studies
Exercise Test / instrumentation
Football / physiology
Isometric Contraction / physiology*
Muscle Contraction / physiology
Muscle Fatigue / physiology
Muscle Strength / physiology*
Physical Exertion / physiology*
Reproducibility of Results
Running / physiology
Sports / physiology*
Task Performance and Analysis

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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