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Fred Duncan
@Fred__Duncan
Early specialization is often sold as a shortcut, but it often comes at the cost of broader development.

A recent study (VanZile et al., 2025) on 110 male high school athletes compared countermovement jump (CMJ) and dynamic balance performance across low, moderate, and high
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Fred Duncan
@Fred__Duncan
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Fred Duncan
@Fred__Duncan
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Fred Duncan
@Fred__Duncan
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Fred Duncan
@Fred__Duncan
specialization groups. CMJ performance? No significant difference. But dynamic balance, assessed via the Y-Balance Test, was significantly worse in the high-specialization group.

Repeating the same patterns year round may refine specific skills, but it can also narrow movement
Fred Duncan
@Fred__Duncan
options, expose coordination specialization groups. CMJ performance? No significant difference. But dynamic balance, assessed via the Y-Balance Test, was significantly worse in the high-specialization group.

Repeating the same patterns year round may refine specific skills,
Fred Duncan
@Fred__Duncan
but it can also narrow movement options, expose coordination gaps, and raise injury risk.

This doesn’t mean avoid sport-specific work. It means don’t ignore general physical development, especially early on. You’re not just building a skill set. You’re building an athlete.
Fred Duncan
@Fred__Duncan
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