Do double Dutch, e.g., 8 letters
Do part of a boxer's training regimen, 8 letters
Participate in a game of Double Dutch, 8 letters
Play at recess, 8 letters
Play Double Dutch, 8 letters
Play double Dutch, say, 8 letters
Train for a boxing match, perhaps, 8 letters
Train for a fight, 8 letters
Train for a fight, say, 8 letters
Train for the ring, in a way, 8 letters
Try double Dutch, say, 8 letters