Article
Growth comes from repetition: a little exercise, a little learning, rest and another attempt.
Tests
Reviews of youth sports point to the importance of frequency, structure and longer participation, although there is no one ideal dose for everyone.
Jiu-jitsu
Two easy workouts a week can do more than infrequent, too intense bursts.
Sources: Wade et al. (2026); Bu et al. (2010).
