1500 half an hour, you jump too slowly. I finished it in 1000 10 minutes. Skipping rope is a good way to lose weight, but it takes time. A group of 300 people can jump 2-3 groups. Then change a group of 200, jump 3-5 groups, and change another group 100. Each group rested for half a minute and strained their hamstrings for half a minute. In this way, it will take about 40 minutes to complete. It should be effective. If you can't stick to it at once, you can also practice in sections. Three hundred people dance three times in a group in the morning, noon and evening. Remember to stretch.