The leg press machine acts as a guide to proper leg and back positioning for you as you work your quadriceps.
Sit on the machine with your back and head against the padded support.
Place feet on the foot plate about hip width apart, ensuring the heels are flat. The legs should form an angle of about 90 degrees at the knee with a little variation either way as long as the heels sit flat on the plate.
The knees should be in line with the feet and neither bowed inward nor outward.
Your bottom should not be raised from the seat platform. If it is, and the legs are at too sharp an angle, then you need to adjust the seat back until the correct position is enabled. You can recognize this poor position when the knees seem to be in front of your eyes and you feel cramped.
Grasp the assist handles
If You have medical condition which might need special attention then seek medical or experts advice. Protection from adult is required when children and elder are using it.