In summer, we need to do a good job of sun protection, but also need to pay attention to timely hydration, so we mostly choose a relatively convenient cup or cold water cup.
In the mid-summer season, whether it's a surfing trip to the beach or being stuck in a rainy city, there's always a word "Water" Around everyone. In such hot weather, we are eager to have a "Close contact" With the water. But the temper of the water is difficult to understand ah, said to turn the other cheek, the threat to everyone's life and safety.
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?
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.