Treatments. Lateral collateral ligament tears do not heal as well as medial collateral ligament tears do. Grade 3 lateral collateral ligament tears may require surgery. In some cases, all that is required is rest, wearing a brace, taking pain relievers such as ibuprofen and having physical therapy.
Research does suggest that the lying leg curl is better at activating the lower lateral and lower medial hamstrings compared to the semi-stiff leg deadlift, but this doesnât necessarily mean itâs a required movement.
3. Leg extensions can be harmful to your knees. The position of your legs in the exercise place a lot of torque on the connective tissue in the knee joints. Heavy leg curls, especially if you use momentum, can really mess your knees up. Back off on the weight and focus on the squeeze instead.