Potential Breakthrough in ACL Injury Prevention

Most everyone remembers the old “shin bone connected to the knee bone, knee bone connected to the thigh bone” song. While not exactly taught in medical school, everything in the leg is connected one way or another. And according to a recent study, calf muscles, not hamstrings may have more to do with ACL and knee injuries than previously thought.

The study was conducted by The University of Western Australia’s School of Sport Science as well as the University of Tennessee’s Exercise and Health program. The groups observed a series of Australian Rules football players each doing single leg jump landings while attempting to grab a football.

Analysts set up a series of 12-cameras to create a three-dimensional computer model of each football player’s jumping and landing. The findings surprised the researches and Assistant Professor Cyril Donnelly of UWA said:

“This was initially surprising as 30 years of clinical research has suggested the hamstring muscles were key players for supporting the knee during sporting tasks, We are not saying you don’t use your hamstrings, just not as much as we originally thought.”

The previously linked article states over 200,000 ACL injuries occur every year in the United States alone, and these numbers by the University of California, San Francisco claim approximately 70% of these injuries occur playing sports. Soccer, football, skiing and basketball being the primary sports behind ACL injuries.

Be it a figure skater coming off of a double-axel, a defender trying to head a corner kick out of his box or an outfielder leaping at the wall to rob a home run, one-leg jump landings are incredibly common in many sports. From an injury prevention standpoint or even rehabbing post-injury, perhaps we’ll begin to see trainers and medical staff focus more on the calf when dealing with ACL issues.

(Header photo via Becky Stern)