Four lower-body moves
Leg extension, leg curl, hip thrust and calf raise on one frame.
Extension, curl, hip thrust, calf raise
FEIERDUN 4-in-1 Leg Extension & Curl Machine, 700 lb
4.3 · 188 ratings$199.99
Price checked October 25, 2026; the partner store shows the live price at checkout.
Color and plates: Black
Ships from our partner storeReturns through your order pageFEIERDUN coverage on key partsQuestions? Our spotter desk answers
Product overview
Leg extensions and hamstring curls are the two machines most people miss after leaving a commercial gym. Our 4-in-1 puts them in one frame and adds hip thrusts and calf raises, switching between movements with a plug-and-play arm on linear bearings. Commercial-grade steel holds 700 lb, and a wide, padded base keeps it planted on hard reps.
700 lb steel frame
Commercial-grade build with non-slip pads and a wide stance.
Small home footprint
About 38.5 × 34 inches, with plate storage on the machine.
Extension, curl, hip thrust, calf raise
Why we built the 4-in-1 Leg Extension & Curl
The seat edge is curved to follow the knee as it bends and straightens, and the foam rollers are thick enough to stay comfortable over long sets. Every adjustment point moves to your height. It measures roughly 38.5 × 34 inches, has a plate storage bar on the frame, and takes both 1-inch and 2-inch plates through the Olympic adapter — or order it with a 100 lb or 160 lb plate package.
Specifications
| Capacity | 700 lb |
|---|---|
| Movements | Extension, curl, hip thrust, calf raise |
| Plate fit | 1-inch and 2-inch |
| Footprint | 38.5 D × 34 W × 38.5 H in |
| Colors | Black, Coral Orange, Black-Orange, Red-Black |
| Packages | Machine only, +100 lb, +160 lb plates |
What we love
- Quads and hamstrings isolated at home
- Four colorways
- Plate packages available
Good to know
- Plates not included on the machine-only version
- Assembly takes around 40 minutes
What lifters say about the 4-in-1 Leg Extension & Curl
4-in-1 Leg Extension & Curl
Easy to assemble, perfect for my home gym. Good quality, nice bright orange matches the other equipment nicely. Smooth range of motion, good solid piece of equipment. Easy transition from leg extension to leg curl. Not sure how many weight plates it will hold as currently I’ve only been using 1-25lb plate to start with. Very happy with my purchase.
Lisa · August 30, 2026Questions about the 4-in-1 Leg Extension & Curl
How long does assembly take?
With the printed steps and the video, most people finish in under 40 minutes.
Which plates fit?
The included Olympic adapter takes 2-inch plates, and 1-inch plates fit directly — spring clips hold both.
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4-in-1 Leg Extension & Curl
$199.99 · Black