- Lie face down on a leg curl machine and lock your heels under the foot pad. Make sure your legs are fully extended and the foot pads are resting on the back of your ankles.
- If the machine is equipped with handles, grip them. If not, grip the front of the pad you are lying on.
- Remaining flat on the bench, with no arching of your spine, curl your legs up in a smooth arcing motion by bending your knees until your hamstrings are fully contracted. Hold for a count of one.
- Slowly lower your legs to the starting position in a smooth arcing motion.
- Repeat
Don't use so much weight for this exercise that you need to swing or jerk the weight up. Doing so can cause injury to your lower back and / or hamstrings. Start with a lower weight until your strength increases.