Starting early in one sport increases the chance of being identified and developed by elite training systems, as scouts and coaches often prioritize early achievers for scholarships and professional tracks.
Research shows that many elite adult athletes did not specialize early, and that early high performers can plateau or drop out when late bloomers catch up.
See this review: British Journal of Sports Medicine.
Children who develop early physically are often mistaken for being more talented, leading to skewed advancement that may overlook late-developing but more resilient or skilled peers.
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