Leg extension on a machine feet toward inside

Extend the knee progressively and control the resistance on the way back. Keep the pelvis supported and avoid using torso momentum. Prioritize control over speed. Maintain useful tension through the range and deliberately reset the starting position before the next repetition.

Do not turn the final repetitions into fast or partial movements. Aim to load quadriceps without sacrificing position; at intermediate level, progress control first and then add load, repetitions or complexity. Set the seat, backrest and machine axis before loading it; poor setup changes the path and often creates compensations.