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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 90º 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.
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