Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2005) 04, 153 - 159

Research article
Comparison of Unilateral Squat Strength Between the Dominant and Non-Dominant Leg in Men and Women
Kevin McCurdy , George Langford
Author Information
Valdosta State University, 1500 N. Patterson St., Valdosta, GA, USA

Kevin McCurdy
✉ 1500 N Patterson St., Valdosta State University, Valdosta, GA. 31698, USA
Email: kmccurdy@valdosta.edu
Publish Date
Received: 12-01-2005
Accepted: 05-04-2005
Published (online): 01-06-2005
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ABSTRACT

The purpose of this study was to compare unilateral squat strength of the dominant and non-dominant leg in young adult men and women. Seventeen apparently healthy men (mean mass 90.5 ± 20.9 kg and age 21.7 ± 1.8 yrs) and 25 women (mean mass 62.2 ± 14.5 kg and age 21.9 ± 1.3 yrs) completed the study. To determine unilateral strength, the subjects completed a one repetition maximum (1RM) modified unilateral squat (MUS) on the dominant and non-dominant leg. The subjects completed the squat to a depth that attained a 90° angle at the knee. This exercise was executed by placing the top of the metatarsophalangeal area of the foot of the uninvolved leg on a support bar behind the subject to isolate the use of the lead leg. Paired samples t-test revealed no significant difference between the men’s 1RM mean strength on the dominant (107.0 ± 21.4 kg) and non-dominant (106.0 ± 21.4 kg) leg with a mean side-to-side difference (comparing the stronger to the weaker leg) of 2.8 %. Leg strength symmetry was also found between the women’s 1RM mean strength on the dominant (45.3 ± 12.5 kg) and non-dominant (45.0 ± 12.4 kg) leg with a mean side-to-side difference of 5.0 %. The data indicate that unilateral squat strength, measured in a weight bearing stance, is similar in the dominant and non-dominant leg in apparently healthy young adult men and women.

Key words: Closed Chain, limb symmetry, single-leg strength, unilateral assessment


           Key Points
  • MUS strength was similar between the dominant and non-dominant leg in young adult men and women.
  • Mean side-to-side differences (comparing the stronger to the weaker leg) resulted from higher dominant and non-dominant scores for the men and women
  • The range of side-to-side differences warrants the practice of weight bearing strength assessment to identify those at risk for injury.
 
 
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