How does a hind leg muscle injuries affects the jumping movement of a grasshopper?

the hind legs are folded in the shape of a Z in the position poised for a jump. the legs of grasshopper jerks backwards when the extensor muscle contracts. when the flexor muscle in the upper part of the grasshopper's legs contract, the lower parts of the legs are pulled towards the body. the grasshopper propels forward and upward into the air. if the hind leg muscle injured, the grasshopper cannot jump but it can walk.