Sled Lying Squat
- Target muscle
- Gluteus Maximus, Quadriceps
- Synergist muscles
- Adductor Magnus, Soleus
- Equipment
- Sled machine
- Body part
- Thighs
- Type
- Strength
The sled lying squat is a sled machine exercise performed lying on your back, pushing the footplate upward to load the quadriceps and gluteus maximus through a full range of motion. The adductor magnus and soleus assist throughout the drive. The lying position unloads the spine while still allowing heavy lower-body training, making it a useful option for lifters who need to limit axial compression.
How to do the Sled Lying Squat
- 1Set the sled machine to a load appropriate for your strength level and lie flat on your back on the platform, positioning your head toward the footplate end.
- 2Place your feet shoulder-width apart on the footplate, toes pointing slightly outward, with your heels near the bottom edge of the plate.
- 3Release the safety locks and allow the sled to lower until your knees are bent at roughly 90 degrees and your thighs are close to your torso.
- 4Brace your core and press your lower back firmly into the pad to stabilize your pelvis before each rep.
- 5Drive through your heels and mid-foot to push the footplate upward, extending your hips and knees simultaneously.
- 6Press until your legs are nearly straight but avoid locking your knees out at the top.
- 7Lower the sled under control back to the starting position, allowing your knees to travel in line with your toes throughout the descent.
- 8Complete all reps, then engage the safety locks before releasing your feet from the footplate.
Form tips
- Keep your heels in firm contact with the footplate throughout the movement — letting them rise shifts load away from the gluteus maximus and onto the knee joint.
- Control the descent over at least two seconds; rushing down removes tension from the quadriceps and reduces the training stimulus.
- Track your knees over your second and third toes on both the push and the lowering phase to protect the knee joint.
- Keep your lower back flat against the pad rather than allowing it to lift off, which can place unwanted stress on the lumbar spine.
- Exhale during the pushing phase and inhale as you lower the sled to maintain intra-abdominal pressure.
Common mistakes
- Allowing the knees to cave inward on the push, which stresses the medial knee structures and reduces gluteus maximus engagement.
- Locking out the knees aggressively at the top, which transfers load to the joint rather than the muscles and can cause hyperextension over time.
- Letting the lower back peel off the pad at the bottom of the range, which shifts stress onto the lumbar spine instead of the target muscles.
- Using a range of motion that is too shallow to achieve a meaningful stretch on the quadriceps and gluteus maximus, limiting muscle development.
- Allowing the feet to slide up the footplate during the set, changing the knee angle and reducing gluteus maximus involvement in favor of the quadriceps alone.
Frequently asked questions
What muscles does the sled lying squat work?
The primary movers are the gluteus maximus and quadriceps. The adductor magnus assists with hip extension while the soleus stabilizes the ankle and assists with the drive through the footplate.
How is the sled lying squat different from a leg press?
Both exercises are horizontal pushing movements performed against a sled-style load, but the sled lying squat places the user flat on their back beneath the footplate rather than in a reclined seat. The positioning can differ in hip angle and the degree of lumbar support, though the muscle recruitment pattern is closely similar.
Is the sled lying squat safe for people with lower back issues?
The lying position reduces axial spinal loading compared to standing squat variations, making it a common alternative for those managing lower back sensitivity. However, allowing the lower back to peel away from the pad at the bottom of each rep reintroduces lumbar stress, so a controlled range of motion and a stable pelvis are essential.
What foot position should I use on the sled lying squat?
A shoulder-width stance with toes turned out slightly is a reliable starting point for most lifters. Placing the feet higher on the footplate increases hip flexion depth and shifts more emphasis to the gluteus maximus, while a lower foot position emphasizes the quadriceps more directly.
How much weight should I use on the sled lying squat?
Start with a load that allows you to complete the full range of motion with your lower back flat against the pad and your knees tracking cleanly. Progress the load only once you can control the descent and maintain consistent foot and knee position throughout all reps of a set.
