|*Picture by Lai Jun Wei/ Red Sports|
The researchers matched the injury free athletes and the injured athletes as closely as possible in terms of height, weight, dominant limb side and sport to eliminate other factors and then compared their quadriceps and hamstring strength. In addition, a similar group of uninjured male athletes who acted as controls were matched to the injured female athletes as secondary control as well.
The results specifically show that the female athletes who tore their ACL's had weaker hamstring strength as compared to their male counterparts although quadriceps strength was not weaker. In direct contrasts, female athletes who did not tear their ACL's had decreased quadriceps strength and similar hamstring strength compared to matched male athletes.
The researchers concluded that excessive quadriceps strength in relation to hamstring strength is a significant risk factor for ACL injury in female athletes.
Meyer GD, Ford KR et al (2009). The Relationship of Hamstrings and Quadriceps Strength to Anterior Cruciate Ligament Injury in Female Athletes. Clinical J of Sports Medicine. 19(1) : 3-8
*Picture by Lai Jun Wei/ Red Sports