Position your body in the standing leg curl machine by firmly planting one foot on the ground and resting the leg pad on the back of your ankle. Grip something in front of you and curl the weight up towards your body. Fully contract your hamstring when you reach the top of the movement and then lower the weight under control back to the starting position. Continue until you have reached muscular failure and then switch legs.
Tip: To maximize the stimulation to your hamstrings, make sure that you use a full range of motion. This means curling the weight all the way up towards your body and getting a full stretch at the bottom. Do not rest the weights at any point during the exercise as this will take the stress off of your hamstrings.