Tuck Jump
The tuck jump is a common substitution for double-unders. From a standing position, jump as high as you can straight up. While you are in the air, pull your legs up under you, tucking into a ball. Then straighten them back out to land.
The tuck jump is a common substitution for double-unders. From a standing position, jump as high as you can straight up. While you are in the air, pull your legs up under you, tucking into a ball. Then straighten them back out to land.