Leg Extension & Curl Machines for Sale

Leg extension and leg curl machines isolate the quads and hamstrings — the two muscle groups that heavy squats and presses leave partially trained. Our seated extension, seated curl, and prone curl models complete any leg day.

Leg Extension & Curl Machines Buying Guide

Single-joint leg machines are how serious lifters finish leg day and how beginners build strength safely.

Types: Leg extension (quads, seated), seated leg curl (hamstrings with less back stress), and prone/lying leg curl (alternative angle, more range).

What to look for: adjustable ankle pads and backrest, smooth cam action that matches your strength curve, start-weight of the stack for selectorized models, and a comfortable knee pivot that lines up with the machine axis.

Who it suits: every gym — extensions and curls are standard in strength zones, rehab centers, and home setups. A combo machine saves space by combining both movements.

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Frequently Asked Questions

Is the leg extension machine bad for your knees?
Not when used with a moderate range of motion and controlled weight. The machine is safe for most lifters and is widely used in knee rehab. Avoid locking out with heavy loads and keep the pad aligned with your knee joint.
Leg extension vs leg curl: what do they work?
The leg extension works the quadriceps (front of the thigh). The leg curl works the hamstrings (back of the thigh). They are opposing movements and should be trained together for balanced legs.
Seated vs prone leg curl: which is better?
Seated curls keep tension on the hamstrings with the hip flexed, which most lifters find more comfortable. Prone (lying) curls change the angle and can be harder to control. Many gyms carry both.
What is a leg extension and curl machine?
A combo machine combines both movements in one station, switching between extension and curl with a seat adjustment. It saves floor space in home gyms and adds circuit efficiency in commercial gyms.

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