Edema is also seen within the gluteus maximus and adductor muscles. Partial tear and hematoma involving the semimembranosus, semitendinosus and proximal biceps femoris muscles. Edema within the gluteus maximus and adductor muscles. Hamstring muscle injuries are common in many sports, especially those requiring bursts of speed or rapid acceleration. Most complete hamstring ruptures are due to laceration or direct blows.
Musculotendinous ruptures are much more likely if there is some intrinsic pathologic abnormality.
McMaster found that health musculotendinous units will not rupture through the tendon, but at the musculotendinous junction, the belly of the muscle, or at the bone tendon junction. Garrett relates the rapid force production of type II fibers and the susceptibility of these two-joint muscles to large extrinsic forces, to the occurrence of hamstring injuries. Blasier R and Morawa L. Complete Rupture of the Hamstring Origin From a Water Skiing Injury. American Journal of Sports Medicine. Palmer WE, et al.