In the process of squat, the force on the thigh is the largest, from 45 degrees to 120 degrees. The maximum stress of gluteal muscle and biceps femoris is 45 degrees to 90 degrees, and the maximum stress of quadriceps femoris is 90 degrees to 120 degrees. When it is greater than 120 degrees, the force on the thigh muscles gradually decreases until it cannot stand upright.

During the half squat (45 degrees to 120 degrees), the gluteal muscles and thigh muscles are always under stress. Semi-squat with light weight, fast speed and many times has a stronger stimulating effect on thigh muscles. Compared with squat, the negative weight of semi-squat can be lighter, but the effect is more obvious.

So as far as developed thigh muscles and gluteal muscles are concerned, half squat is better than deep squat.