… And that is even more true in young athletes.
🧐 During growth, a young athlete is not learning movement on a “finished body.”
😱 The body itself is changing.
🔥 The work of showed that growth during adolescence is not linear and not synchronized:
legs, trunk, arms and muscle mass do not grow at the same speed.
🚨 Coordination constraints evolve throughout puberty: Leverage, balance, timing and force production can temporarily change during growth spurts.
🚨 A movement solution that works at 13 may need to adapt again at 15… and again at 17.
🚨 This is why parents and coaches should be cautious with “coaches” selling one universal swing or throwing model for every athlete...
- Human growth is individualized.
- Motor organization is individualized.
- Development should be individualized too.
@shegone03@PeloteroApp@CC20rake@MotorPreference #baseball #softball @LittleLeague@USABaseball@USABaseball #sportscience #motorpreferences
Fernando Tatis Jr.’s bat speed is actually UP.
But observationally, the movement pattern has changed.
2025:
• More rhythm
• Shorter stride
• Earlier into the front side
• Rotating around the front leg naturally
2026:
• Longer stride
• More push from the back leg
• Hands getting stuck behind him more often
• Attack Direction shifts from 1° oppo → 4° oppo
When hitters stop rotating around their natural axis of rotation, the hands often get trapped behind the body and start working around the baseball instead of freely out in front.
Sometimes the issue isn’t force production or bat speed.
It’s movement organization and repeatability.
Go back and watch clips of Tatis at 16 years old. A lot of the movement solutions were already there.