. The quadriceps, on the front of the thigh, comprises four muscles that extend and stabilise the knee and decelerate the forces of impact when the foot lands.Unlike most muscles, the hamstrings and the quadriceps cross two joints – the hip and knee – which means
will necessitate compensation in other joints further up the body."The foot is active in both the landing and push-off phases of the running cycle, so it’s involved in absorbing the shock of impact (upon landing), then controlling the forces generated by running