Dean Mendez

Testo Fuel While many people enjoy using treadmills in gyms or their own homes, running outside is better exercise. Treadmills are a great bad-weather substitute, but there's nothing quite like running on pavement. You can get strong thighs, which will protect your knees. Located behind the kneecap, a torn ligament is a very common injury in sports. Include strengthening exercises for your quadriceps and hamstrings if you want to protect your knees. Leg curls and leg extensions represent good examples of such exercises.