Are you a runner? Do you play a sport that involves running? Then you may be at risk for a groin injury. Read this to understand if you're at risk and check out these simple injury prevention exercises.
Ahhh, the knee cave, my old friend. This, by far, is the most common strength and movement pattern deficit I see in developing athletes. More officially known as a valgus position of the knee, it signifies not only a severe lack of specific and general strength, but also may be an indicator of poor body control overall (due to other common muscular strength deficits that generally come as part of the "package").