[mcn]

NOT TRUE!

If you do some research most of the time it is based on q angles (the angle between the hip & knee), hormones (females tend to tear their ACLs closer to their time of the month) and the way the quad muscles fires when landing.

If you look at when a girl jumps and land they usually have a knock knee affect to their knees. This puts a TON of pressure on their knee/ACLs.

Agree on this too. Girls land differently when they jump. However, doesn't explain the increase in male knee problems. I have 2 trains of thought on this....1. Increase in weight training that focuses on only select areas of the body, thus placing strain on the joints that were not designed to accept the extra stress..and 2. more old school, but here goes...todays kids don't ride bicycles like was done 20-30 years ago. Think about it, back then if you wanted to go visit a friend, you ususally rode a bike to to get there. If you were like me that could be several miles to a friends house. How many times do you see teenagers riding bikes these days? Bicycling is probably the best exercise to strenghten your legs and build endurance.