1. Important Safety Information
Please read this entire manual before assembling or using the FEIERDUN Leg Extension and Curl Machine. Keep this manual for future reference.
- Consult a physician before starting any exercise program.
- Ensure all bolts and nuts are securely tightened before each use.
- Do not exceed the maximum weight recommendation of 245 pounds for weight plates.
- Keep children and pets away from the equipment during operation.
- Use the machine on a flat, stable surface.
- Always use proper form and controlled movements to prevent injury.
2. Product Overview
The FEIERDUN MNHX-TT-PINK Leg Extension and Curl Machine is a versatile piece of home gym equipment designed for comprehensive lower body workouts. It allows users to perform both leg extensions to target quadriceps and lying leg curls for hamstrings. The machine features a robust alloy steel frame, multiple adjustment points for personalized fit, and a true 1:1 cable ratio for accurate resistance.
- Dual Function: Seamlessly switch between leg extensions and lying leg curls.
- Adjustability: 15 positions for leg extension, 11 settings for leg pad, and 9 levels for backrest.
- Stability: Extra-wide base (50.39” x 42.51”) and heavy-duty 2”x3” (1.5mm thick) steel frame.
- True 1:1 Cable Ratio: Ensures 100% of chosen weight is transferred to muscles.
- Comfort: Thigh restraint foam pads, widened seat (15.3 x 17.3 inch), and extended backrest (22.8 x 12.2 inch).
- Compact Design: Dimensions of 50″ L x 42″ W x 43″ H, suitable for home gyms.
Figure 1: FEIERDUN Leg Extension and Curl Machine.
3. Assembly Instructions
The FEIERDUN Leg Extension and Curl Machine comes with detailed assembly instructions and all necessary tools. An installation video is also available to guide you through the process.
Figure 2: Visual guide for assembly steps.
Video 1: Assembly and initial setup of the FEIERDUN Leg Extension Machine.
4. Adjustments
The machine offers extensive adjustability to accommodate various user heights and exercise preferences. Locate the quick-release pins and adjustment knobs for each component.
- Leg Extension Arm: Adjust the starting position of the leg extension arm using the pin, offering 15 different positions.
- Leg Pad: The leg pad features 11 settings to ensure proper alignment and comfort during exercises.
- Backrest: Adjust the backrest to one of 9 levels for optimal support during seated exercises or to flatten for lying curls.
- Thigh Restraint: Utilize the adjustable thigh restraint foam pads to securely hold your legs in place, preventing lifting and knee injuries during leg extensions.
Figure 3: Illustration of the 15x11x9 adjustable positions for personalized training.
Figure 4: Thigh restraint mechanism to ensure proper muscle engagement and prevent injury.
Video 2: Detailed demonstration of machine adjustments and usage for various exercises.
5. Operating Instructions
This machine supports both leg extensions and lying leg curls. Ensure the machine is properly adjusted for your body and the desired exercise before beginning.
5.1. Seated Leg Extension
- Adjust the backrest to an upright position and the leg pad to comfortably secure your thighs.
- Sit on the seat with your back firmly against the backrest. Position your shins against the lower foam rollers.
- Extend your legs upwards, contracting your quadriceps. Control the movement as you slowly return to the starting position.
Figure 5: Proper form for seated leg extension.
5.2. Lying Leg Curl
- Adjust the backrest to a flat or slightly declined position.
- Lie face down on the bench, ensuring your knees are just off the edge of the bench. Position your lower calves against the foam rollers.
- Curl your legs upwards towards your glutes, contracting your hamstrings. Slowly lower your legs back to the starting position.
Figure 6: Proper form for lying leg curl.
5.3. Other Exercise Possibilities
The versatile design of the FEIERDUN machine allows for adaptation to other exercises, including Hip Thrust, Bicep Curl, Ab Crunch, and Tricep Extension, by utilizing various parts of the bench and adjustable components.
Figure 7: Examples of additional exercises that can be performed using the machine.
6. Loading Weight Plates
The machine is designed with a true 1:1 cable transmission ratio, meaning the weight you load is the actual resistance you lift. It is compatible with both 1-inch and 2-inch diameter weight plates. The integrated plate storage bar not only keeps your weights organized but also enhances the machine's stability.
Figure 8: Illustration of weight plate loading and the machine's wide, stable base.
7. Maintenance
Regular maintenance ensures the longevity and safe operation of your FEIERDUN Leg Extension and Curl Machine.
- Cleaning: Wipe down the machine with a damp cloth after each use to remove sweat and dust. Avoid abrasive cleaners.
- Inspection: Periodically check all bolts, nuts, and moving parts for tightness and wear. Tighten any loose fasteners.
- Lubrication: Apply a small amount of silicone-based lubricant to moving joints and pivot points as needed to ensure smooth operation.
- Storage: Store the machine in a dry, clean environment away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter any issues with your machine, refer to the following common troubleshooting tips:
- Squeaking Noises: Check and tighten all bolts and nuts. Lubricate moving parts with silicone spray.
- Unstable Operation: Ensure the machine is on a level surface. Verify all frame connections are secure.
- Difficulty Adjusting: Ensure quick-release pins are fully disengaged before attempting to adjust components. Clean any debris from adjustment holes.
For issues not resolved by these steps, please contact customer support.
9. Specifications
| Feature | Specification |
|---|---|
| Model Name | MNHX-TT-PINK |
| Product Dimensions (LxWxH) | 50.39" x 42.51" x 43.3" |
| Item Weight | 99 Pounds |
| Maximum Weight Recommendation | 245 Pounds |
| Material | Alloy Steel |
| Color | Black |
10. Warranty and Support
The FEIERDUN Leg Extension and Curl Machine comes with a 1-year warranty. If you encounter product damage or other problems, please contact our customer support team. We aim to respond within 12-24 hours to provide a satisfactory solution.
Figure 9: FEIERDUN customer support is available to assist with product inquiries.





