Answer:
*Ankle sprains often happen due to improper landing from a jump, misaligned ankles (when they roll in or out) or poorly fitted shoes. Torn ligaments never heal to their preinjury condition. Once you've sprained your ankle, you are at risk of doing it again. It's important to build muscle strength to prevent further injuries.
*when you over used or push your body to the limit you could develop Arthritis in the knee, hip, ankle and foot you can treat it if you relax or have it massage or do some stretching before performing
*Knee injuries: patellofemoral pain syndrome
is pain at the front of your knee, around your kneecap (patella). Sometimes called "runner's knee," it's more common in people who participate in sports that involve running and jumping. Your recovery may also depend on the severity of your injury
Treatment of patellofemoral pain often begins with simple measures. Rest your knee as much as possible. Avoid or modify activities that increase the pain, such as climbing stairs, kneeling or squatting.
Rehabilitation exercises
Supportive braces
Taping
Ice
Knee-friendly sport
hope this can help
