I think there are several reasons for wearing tights. As we all know, if you wear loose clothes in the race, the resistance will increase during running, which will affect your action speed. On the contrary, if you wear tights, the resistance is small and it is convenient for athletes to run. You can increase your speed appropriately to grab the ball.
There is another reason. In the game, we often see both sides fighting for the ball before blocking. Because if you jump up, you may accidentally touch the net. If I wear wide clothes, I think the possibility of touching the net will be greatly increased. On the contrary, wearing tights, the contact area is small, tights will wrap the body. Greatly reduce the chance of touching the net.
Secondly, we will see on TV or other videos that some players will fall to the ground to save the ball. The reason for wearing tight pants can also prevent sudden exposure in the competition field. Of course, these are all considered from the perspective of competition.
Athletes usually have many high-level training actions in training, such as high jump, squat, jump forward and so on. If you want to complete these actions quickly and efficiently, the looseness of clothes will also affect his quality. On the other hand, tights can completely release athletes' limbs, allowing athletes to do training movements without obstacles in training. In this way, it makes sense that tights become the standard of competition clothes.
Back in the past, women volleyball players had to wear tight pants, which were issued by FIVB 1999. So, when defending in the game, or when passing it again and again. It will also be accompanied by related actions similar to horizontal segmentation or vertical segmentation. But this is precisely the split action of driving in a hurry, which is not very standardized.
At this time, the intersection of our thigh root and abdomen is just the edge area of the inner side of tights. This can avoid splitting, of course, it is problematic to pull the edge area of our inner thigh muscles and main tendons when other ordinary sweatpants split horizontally. It also reduces the frequency of our inner thigh injuries.