To help protect your knees NeuroFuse you need to work towards strong thighs. Tearing a ligament that is behind the kneecap is a very common injury to athletes. To keep your knees safe it is crucial to include exercises for both your quads and hamstrings. Both leg curls and leg extensions strengthen your hamstrings and quads.Consider unique ways to get fit. Joining a gym is not the only way to get exercise; there are different ways that you can be active. You need to like what you are doing in order to stick with your regimen.