Leg Curl & Extension Machines

Leg curl and leg extension machines cover the two movements every leg day needs: hamstring flexion and quad extension. Leg curl machines are also commonly called hamstring machines or hamstring curl machines, since curling the knee against resistance is what trains that muscle group. Our lineup covers seated, prone, and unilateral leg curl machines, leg extension machines, and 2-in-1 combo units. We carry Premier Strength, Cybex, Precor, Body Masters, and Hammer Strength, new and refurbished.

Trying to decide between leg extensions and leg curls for your floor? Our leg extension vs. leg curl comparison guide breaks down which muscles each one targets.

Types of Leg Curl & Extension Machines

1

Seated Leg Curl

The most common hamstring machine format. Easy for members to load and adjust themselves.

2

Prone Leg Curl

The classic lying-position hamstring curl machine. Keeps the hips pinned against the pad for strict isolation.

3

Standing Leg Curl

Single-leg, unilateral hamstring work for imbalance correction.

4

Leg Extension

Quad isolation that pairs with any leg curl format. Together, they make a complete station.

5

Extension / Curl Combo

One station handles both quad and hamstring isolation. Ideal for space-limited floors.

Which Type Fits Your Floor?

Type. Best For. Footprint. Resistance. Example in Our Lineup.
Seated Leg Curl. Easiest to load, high member turnover. Standard footprint. Pin-select (weight stack). Premier Strength Predator Series Seated Leg Curl.
Prone Leg Curl. Classic hamstring isolation. Standard footprint. Pin-select (weight stack). Premier Strength Predator Series Prone Leg Curl.
Standing Leg Curl. Unilateral, imbalance correction. Standard footprint. Plate-loaded. Premier Strength Power Series Unilateral Prone Leg Curl (closest current match: prone, unilateral).
Leg Extension. Quad isolation, pairs with any curl. Standard footprint. Plate-loaded. Premier Strength Titan Series Unilateral Leg Extension.
Extension / Curl Combo. Space-limited floors needing both stations. Shares one footprint. Varies by unit. Premier Strength Bravo Series Leg Extension/Leg Curl Combo.

Buying Considerations

  • General commercial floors: seated leg curl plus leg extension is the easiest combination. Members can self-load and adjust it fast.
  • Space-limited floors: a combo extension/curl unit covers both movements in one footprint.
  • Rehab or imbalance-focused programs: unilateral (single-leg) leg curl lets you train and assess each leg on its own, whether prone or standing.
  • Also called: leg curl machines are sometimes listed as hamstring machines or hamstring curl machines in facility programming software or by trainers. Same equipment, different name.
  • New vs. refurbished: moderate-use equipment type. Check pad padding and pivot wear on refurbished units. All inspected and tested before shipping.

Frequently Asked Questions

Seated vs. prone leg curl: which is better for hamstring development?

Both isolate the hamstrings effectively; the difference is mostly hip position and comfort. See the full comparison, including how leg curl pairs with leg extension, in Leg Extension vs. Leg Curl: What's the Difference?

What is a "hamstring curl machine"?

It's the common name for any leg curl machine: seated, prone, standing, or unilateral. All isolate the hamstrings; they differ mainly in body position and which portion of the hamstring gets the most emphasis.

Do I need a leg extension and a leg curl machine, or is a combo unit enough?

A combo unit is the more space-efficient answer for smaller floors and still lets one member train quads then hamstrings without moving stations. Dedicated single-function units are better for high-turnover floors with heavy leg-day traffic.

New or refurbished leg curl/extension machine: does it matter?

This is a moderate-use equipment category. We check pad padding, pivot points, and cable condition closely on every refurbished unit before it ships.