injuries are on the rise, and girls are more likely to get this injury than their male friends.]]> testosterone surge actually helps them increase muscular power and control, allowing them to handle the rapid skeletal growth better.]]> hormones also make the ligaments more lax.]]> femur bones.]]> tibia and femur bones.]]> degenerative knee osteoarthritis than those who never had an ACL injury.]]> lax.]]> surge actually helps them increase muscular power and control, allowing them to handle the rapid skeletal growth better.]]> rehabilitation exercises before they can return to sports.]]> achieved before the injury.]]> intensely all year with few breaks.]]> baseline and identify areas of weakness.]]>