Prevention of knee injuries is dependent upon proper conditioning. the proper ratio of strength is important. ideally the hamstring muscles should be percent of the strength of the quadriceps muscles.

50%

Explanation:

According to my research, based on various studies conducted by professionals it is said that the hamstring muscles should be 50% percent of the strength of the quadriceps muscles. This is the case in order to properly stabilize the joint and prevent injury. This is why professionals ask that you maintain this 2:1 ratio between quads and hamstrings during training.

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