1.** Skipping rope * *: cheap, easy to carry, no special skills, and can be used anywhere with a certain space. Skipping rope has a great influence and needs practice. It seems easy, but beginners may trip over the rope or get hurt. For best results, turn the rope with your wrist instead of your arm, and then gently touch the ground.

2.** Jump * *: It is a kind of self-weight aerobic training, which can quickly increase the heart rate and drive most muscle groups in the body to participate in the training. Your limbs, waist and abdominal muscles will be activated, blood circulation will be accelerated, and calorie consumption will increase.

3.** Bobby jump * *: It is a kind of high-intensity aerobic exercise, which can exercise the whole body muscles. Bobby's jumping action is relatively simple, just jump in place. However, it should be noted that Bobby's jump has a great influence on his knees. If you have problems with your knees, this action is not recommended.

4.** Flat support * *: It is one of the common sports modes without equipment. Flat support can exercise many parts such as pectoral muscle, deltoid muscle and latissimus dorsi. The longer the support, the greater the stimulation to the muscles.