The earliest medicine balls were probably used by ancient persian athletes to increase strength and endurance. These early ones used at least 3000 years ago were usually sand-filled animal bladders. You will find references in later texts to the use of medicine balls advocated by hippocrates, the father of medicine, about 2500 years ago. He recommended the use of round animal skins, which could also be filled with sand, as a way of training athletes or helping them recover from injuries.
Because of the physical differences between boys and girls, resulting in a difference in the weight of the elastic band training. Girls' muscle strength is worse than boys, boys in the elastic band weight-bearing exercises, we must increase their training weight, so that their fitness effect is more obvious. So how to choose the weight of the elastic band?
It is the dream of all women to have a pair of long, firm and slender legs. But thin legs are not the only thing that makes a leg beautiful. Firm thigh muscles, well-proportioned calf muscles and natural leg muscle lines are what make a leg truly beautiful.
Yoga aids can make the posture more relaxed. Of course, in addition to using aids to simplify the pose. It can also make the poses more difficult or even make them more interesting.