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Hamstring/quadriceps ratios in college football players: A high velocity evaluation

Athletic Medicine Clinics at San Diego State University, San Diego, California, Oklahoma City University, Oklahoma City, Oklahoma

William A. Grana, MD

Athletic Medicine Clinics at San Diego State University, San Diego, California, Oklahoma City University, Oklahoma City, Oklahoma

Hamstring/quadriceps ratios were assessed on 60 in tercollegiate football players at functional speeds of 90, 180, and 300 deg/sec on the Cybex II. The ratio rose as velocity of exercise increased and the quadriceps was stronger than the hamstrings at all speeds. The flexor/extensor ratio differed bilaterally at all speeds with ratio lower for the dominant knee.

The study helped establish normative data on ham string/quadricep ratios on football players at functional speeds. Furthermore, the ratio provides a guide to observe muscle imbalances which could be a factor in injury.

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