A study into the performance of soldiers in the US armed forces has found that soldiers who smoke can have an increased risk of injury and may lack the physical capability of their non-smoking counterparts. Studies by U.S. Army Public Health Command (USAPHC ) found that smoking in soldiers increases the risk of sustaining injuries, particularly overuse injuries and damage to musculoskeletal tissue that accumulates with repetitive activities, such as running. The risks of injury have been found to be up to 90% higher for smokers than non-smoking soldiers.