Reverse double-legged alternate jump rope
This experimental content practice time is 120 s, the number of exercises is not less than 120 times, practice intensity is about 120–140 r/min, after a gap of 30 s to practice the next content. This action must keep the body upright, from the front of the body through the top of the head to the back of the body to complete the hands, feet together with the bent knee leg lift and empty over the rope practice, in any direction to move.