What question did this study set out to answer?

This investigation aims to develop and validate equations to estimate quadriceps, hamstrings, and total thigh muscle cross-sectional area (CSA).

Anthropometric estimation of thigh muscle cross-sectional area

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Randomized trial derives circumference and skinfold equations for estimating thigh muscle CSA in adults, suggesting practical assessment methods.

This investigation aims to develop and validate equations to estimate quadriceps, hamstrings, and total thigh muscle cross-sectional area (CSA).
Participants included 43 adult males with mean age of 25 years who underwent MRI.
Multiple regression analyses derived prediction equations based on thigh circumference and skinfold assessments.
Cross-validation analyses were performed on different muscle groups using 30 in the derivation group and 26 in the CV group.
Cross-validation errors for quadriceps CSA ranged from 5.4 to 14.4 cm², for hamstrings 3.3 to 5.5 cm², and for total thigh muscle CSA 10.0 to 25.4 cm².
The equations are recommended for estimating CSA when advanced imaging techniques are not available.

Housh et al. (1995) studied this question.

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Randomized trial derives circumference and skinfold equations for estimating thigh muscle CSA in adults, suggesting practical assessment methods.