Grip strength is determined by a complex interaction between genetic factors and learned behaviors rather than being solely one or the other. Genetics establish a hereditary foundation that sets a baseline potential and influences structural characteristics like hand size and muscle fiber composition. However, grip strength is also a highly modifiable, learned neuromuscular skill that adapts robustly to mechanical loading and specific training protocols. Ultimately, lifestyle choices like exercise can even induce epigenetic changes that modify how genes are expressed, bridging the gap between biological potential and physical performance.
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