>>Sit in a leg-press machine, placing your feet about shoulder –width apart against the resistance platform. You hould feel pressure on the entire soles of both feet
>> with your hips and back against the back support, release the locking lever at the sides of the seat, then straighten your legs to full extension, but don’t lock out. This is the starting position.
>>Inhale slightly more than usual and hold your breath as you bend your knees to lower the platform at a slow to moderate speed until you reach an 80 – 90 degrees angle in your knees (measured from the back of your shines to the back of your thighs ).
>> Press the resistance platform back to the starting position, exhaling as you pass the most difficult part the pressing action (about tha halfway point).
>> Inhale and repeat the movement for the desired number of reps.
Leg Presses Without Machines : Simple & Effective Exercises