Here are some things you can do to protect your ACL from re-injury or more severe injuries: Stretching can help to warm up your muscles and prepare them for use. This can reduce the risk of injury significantly. Focus on strengthening your quadriceps muscles to keep your knees from buckling. Practising balance exercises on one leg will also help maintain stability in that area. You may also consider wearing an appropriate brace when playing sports. The right brace will keep your knee in place so you don't put as much pressure on it while running or jumping. Finally, wearing proper footwear is imperative for maintaining good foot alignment. You can also ask your ACL surgeon in Singapore about other ways you can support your knee and prevent severe injuries.