Quick Summary
The FEIERDUN 4-in-1 Adjustable Leg Extension and Curl Machine is a leg trainer with a plug-and-play design that supports leg extension, leg curl, hip thrust and calf raise exercises. It uses linear bearings and is described as being made from commercial-grade steel.
The machine is presented as an adjustable home training option with a stated footprint of 33 x 34 x 38.5 inches. It is also described as fitting 1-inch or 2-inch plates, which is an important check before ordering your weight plates.
Who It Is Best For
This machine suits buyers who want one leg trainer for several lower-body exercises and who have space for a fixed home setup. It is also relevant if you want a machine that works with either 1-inch or 2-inch plates.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | FEIERDUN, so the product can be identified clearly. |
| Product type | 4-in-1 adjustable leg extension and curl machine for multiple lower-body exercises. |
| Exercises listed | Leg extension, leg curl, hip thrust and calf raise are named uses. |
| Construction | Described as commercial-grade steel with linear bearings. |
| Load note | Stated to bear 317 kg, which is a key figure to check against your intended use. |
| Plate compatibility | Fits 1-inch or 2-inch plates, so your plates need to match the adapter. |
| Size | 33 x 34 x 38.5 inches, useful for checking the available floor space. |
| Assembly guidance | Described as taking less than 40 minutes to assemble with instructions and videos. |
Why Buyers Choose It
- The 4-in-1 layout combines several lower-body exercises in one machine, reducing the need for separate equipment.
- The stated 33 x 34 x 38.5 inch size gives a clear space check for home use.
- The 1-inch or 2-inch plate compatibility makes it easier to match the machine to your existing plates.
- The assembly guidance and video support may help buyers who want a straightforward setup.
How It Works
- Set up the machine using the included instructions and assembly video.
- Adjust the relevant parts to your height and training needs.
- Select the exercise position for leg extension, leg curl, hip thrust or calf raise.
- Fit either 1-inch or 2-inch plates to the Olympic adapter.
- Secure the plates with the spring clips before use.
What To Know Before You Buy
Check that your plates are either 1-inch or 2-inch before ordering, as that is the stated adapter fit. The machine measures 33 x 34 x 38.5 inches, so allow enough room for the frame and your training position. If you are planning a home setup, the listed exercises and adjustable parts make it important to check that the machine suits your intended routine.
Pros: It supports four named lower-body exercises in one adjustable machine.
Cons: You need to confirm that your plates match the stated 1-inch or 2-inch fit.
Common Buyer Questions
What exercises does it support?
It is listed for leg extension, leg curl, hip thrust and calf raise.
What plates does it fit?
It fits 1-inch or 2-inch plates, so plate size is an important compatibility check.
How much space does it need?
The stated size is 33 x 34 x 38.5 inches, which helps you check your available floor space.
Is assembly included in the product guidance?
Yes, it comes with assembly instructions and a video, and is described as taking less than 40 minutes to assemble.
Final Buying View
This FEIERDUN machine is a multi-exercise leg trainer for buyers who want an adjustable home setup and who can match the plate size correctly. Check the 1-inch or 2-inch plate fit and the stated dimensions before ordering.






