In the high jump, it is not the sooner the better, but the threshold for taking off must be grasped. Only when you jump in that time period can you jump highest.

When lifting weights, hands should be held on both sides of the vertical handles 10cm, which can make the strength burst to the maximum, which is the point of action of the three elements of physical strength.

In the long jump, the sooner the better, because people have inertia. The faster you are in the air, the slower your speed will be, and the longer your long jump distance will be. This can be found out by the formula V = T/S, which is a variable-speed linear movement involving physics.