At 11 and 12, flexibility work meets the GROWTH SPURT: ranges that tighten as bones outpace muscles, met with doubled gentleness and the maintenance mindset (keeping is winning during spurts). Active work matures (lifts held, kicks controlled), shoulders get their serious opening, and the DAILY short version gets built: five shapes, ten minutes, the habit that survives busy seasons.
This session runs about an hour on carpet. The spurt clause is narrated openly (tight weeks are chapters), active-passive pairings become the method (reach it gently, then lift into it), and the book's flat logging continues. Home remains the range-bank; the gym's coaches spend and progress it.
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Growth spurts: bones lengthen before muscles catch up, and ranges tighten through no fault of training. The response is doubled gentleness and maintenance framing (keeping ranges IS progress), never intensified stretching: the catch-up completes on its own schedule and the ranges return with interest.
Ownership: gentle holds visit ranges while strength-lifts inside them make the ranges usable, which is what the sport spends. The pairing also protects through growth (active work keeps control as lengths change) and it is the method modern gymnastics conditioning runs on.
It is the habit that survives: long sessions die in meet seasons and homework storms, while five owned shapes in ten minutes persist through anything. Flexibility compounds on frequency more than duration, and the daily's streak column quietly decides who still bends at 15.