A new publication in The American Journal of Sports Medicine used CHPs to evaluate the structural integrity leading to noncontact ACL failure as a result of strenuous repetitive impulsive athletic maneuvers. CHPs were used to visualize the molecular level damage to the collagen triple helix and show that repeated mechanical loading weakens the ACL. The figure shows the untested contralateral, unloaded knee (control knee) (A) and the mechanically tested...