Position your feet roughly shoulder width apart.
Push from the heels then unlock the safeties to begin the exercise.
Slowly bend your knees to 45 degree then push back towards the starting position.
Knees caving inwards past big toes when pressing.
Using hands to help push your legs.
Fully extending and locking out your legs.
Starting seated, position your feet in the middle of the platform. Spread your feet so they are approximately shoulder width apart, and pointing slightly outwards. Extend your legs out past the safety locks then unlock the safeties using your hands.
Once the safeties are disengaged, lower the weight by bending your knees in a controlled motion towards yourself until your legs are bent at roughly 45 degrees. Then push back outwards, extending the knees to a point just before your legs fully lock out. Engage your core to keep your lower back and hips firmly against the padding. When you have completed your final repetition, with your legs extended, engage the safety lock and slowly lower the weights back down until the safety lock catches the weight.
Avoid fully extending or locking your knees out.