Key result
Fibre type 1 muscle weight of the ECRB was significantly greater in the right than the left forearm, suggesting both functional demands and genetic factors determine muscle structure.
Cross-Sectional
Both genetic factors and functional demands play important roles in determining muscle structure and fibre type composition in the upper extremities.
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May guide dominant-limb rehabilitation planning; leaves open the relative roles of genetics versus use in fiber-type adaptation.
Fugl‐Meyer et al. (1982) reported a cross-sectional. Right arm (functional demand) vs. Left arm was evaluated on Fibre type 1 muscle weight of the ECRB. Fibre type 1 muscle weight of the ECRB was significantly greater in the right than the left forearm, suggesting both functional demands and genetic factors determine muscle structure.
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