Seated Leg Press

Muscles worked

Quadriceps

Primary muscle

Vastus lateralis

Equipment

Machine

Movement pattern

Lower body

Difficulty

Intermediate

What it is for

StrengthHypertrophy

Watch the full tutorial

• Setting the seat too close to the platform. With the knees against the chest at the start, the pelvis rolls back and the lower back leaves the pad. Adjust the seat so the knees start at 90 degrees with the glutes down.
• Pushing through the toes and lifting the heels. The load concentrates on the knee and the calves take over part of the work. Keep the whole foot flat, push through the heel and, if the heels keep rising, place the feet higher.
• Locking the knees at the end of every rep. With the leg straight the load rests on the joint and the quads stop working for a moment. Stop just short of full extension and go straight back down.
• Shortening the range to move more plates. Pushing 8 inches with the whole stack does not beat a full range with half of it. Choose a weight that lets you reach 90 degrees at the knee with the glutes down.

Which muscles does the seated leg press work?

The quads are the main muscle and extend the knee through the whole range. The gluteus maximus and adductors extend the hip, with a bigger role the higher you place the feet on the platform. The hamstrings contribute little because the knee and hip extend at the same time, and the calves work isometrically so the foot does not lift. With the torso supported, the lower back and abs are barely involved.

Seated or 45-degree leg press: how do they differ and which one should you use?

The 45-degree press pushes an inclined sled upward, with the hip deeply flexed at the bottom: it takes more load and depth, so it is the heavy-set option. The horizontal press moves a weight stack with the torso seated: it is easier to get into, loads the lower back less and usually caps out lower. Pick the 45 for strength and heavy volume; the horizontal to learn the pattern, for long sets or when the incline bothers your back.

How many sets and reps for the seated leg press?

A common starting point is 3 or 4 sets of 10 to 15 reps, leaving 1 to 3 reps in reserve. Because the stack caps the maximum weight, it pays off with medium and long sets rather than sets of 5. It usually comes after the squat as the second quad exercise, or as the main one in sessions where the back does not tolerate axial load. Move up a plate when you complete every set with full range.

Where should you place your feet on the seated leg press?

Shoulder-width and in the middle of the platform is the base position: it splits the work between quads and glutes with the knee tracking over the foot. Feet higher, and the hip flexes more: the glutes and hamstrings join in and the knee travels less. Feet lower, more quads, but the heels tend to lift. A wider stance with the toes out adds the adductors. In every case, the whole foot stays flat through the entire rep.