Seated Leg Extension

Starting position

1. Set up the machine: adjust the back pad so your knees sit right at the edge of the seat and the machine's pivot lines up with your knee joint.
2. Place the roller pad on your lower shins, just above the ankles.
3. Sit down, press your back into the pad and hold the handles at the sides of the seat.
4. Your knees are bent at about 90°, feet relaxed, toes pointing up.

Execution

1. Exhale and smoothly straighten your legs, lifting the pad until your knees are almost fully extended.
2. Pause for a second at the top and squeeze the front of your thighs.
3. Inhale and lower the weight slowly and under control, without letting the plates crash down.

Common mistakes

• Jerking and swinging the weight — the load shifts from the quads to the knee and injury risk goes up.
• Snapping the knees into lockout at the top — extra stress on the knee joint.
• Hips lifting off the seat — the weight is too heavy and other muscles take over.
• Pivot not aligned with the knee — the knee moves off its natural path and may feel uncomfortable.

Beginner tips

• Start with a light weight and 12–15 reps, focusing on smooth movement.
• Lower the weight about twice as slowly as you lift it.
• If your knee hurts, reduce the weight and range of motion or switch exercises.

Alternatives

• Squats — works the quads in a natural movement
• Leg Press — trains the quads together with the glutes
• Dumbbell Lunges — a compound movement emphasizing the quads