On your off / rest days, you can do some cardio workout
like jumprope, interval training, or speed training.
A jumprope was tied to the top of play equipment.
The article doesn't say that any use of
a jumprope will surely kill your child.
Broadway dancer and former Rockette, Amanda Kloots, puts Hannah through the ringer with this workout you can do anywhere — all you need is
a jumprope!