LIONSCOOL Leg Extension and Curl Machine V4.0
Trusted by 3000+ Fitness Enthusiasts
Lionscool Leg Extension is engineered for serious leg training at home — silent, sturdy, and built to last. With the Leg Extension, you’ll enjoy the same leg training quality at home, without commuting, crowds, or time limits.
After just 6 months, it practically pays for itself.
Lionscool offers a 2-year limited warranty covering all structural and functional components under normal use. For warranty support, please contact our customer service team to keep your equipment performing at its best.
Overview
Ultra-Smooth Motion Pulley System
Upgraded from plastic to aluminum for smoother, quieter motion and improved longevity.
Beyond 1:1 Resistance
Experience a >1:1 power ratio that amplifies your plates, delivering a true challenge without the wasted weight common in lesser designs.
Heavy-Duty Steel Frame
Made with thick 6-gauge steel for better stability and long-term durability—especially compared to typical home gym frames.
Effortless Adjustability and Accessibility
With a 6-position adjustable backrest and a 9-angle selector with a self-adjusting roller, you'll achieve a truly expansive and personalized range of motion for every single workout.
Leg Extension V4 Review
Product specification
- Lifetime Technical Support
- 2-Year Frame Warranty: Covers structural steel and welds.
- 1-Year Parts Warranty: Includes wear and tear parts like pulleys and cables.
43"W x 57"D / 65"D(Laid Down) x 40"H
125LBS
5.09'' - 6'23''
600LBS
500LBS
2 Packages
The Lionscool Leg Extension and Curl Machine V4.0 stands out with its fortified structure and advanced features. You'll experience superior stability and performance during every session.
- Robust and Durable Construction: Built with heavy-duty steel, it supports up to 600 lbs of plate loading capacity and an impressive 1100 lbs of user capacity.
- Smooth Cable Pulley System: Enjoy consistent resistance, unlike traditional lever machines. This unique system helps with muscle growth and definition.
- Upgraded Technique: The weight arm connects with an upgraded technique, combined with a strong aluminum pulley and reinforced 8mm-thick cable.
- Compact Dimensions: Assembled upright, it measures 43” width x 57” depth x 40” height. Laid down, its depth is 65”.
- Reliable Warranty: Includes a 2-year frame warranty (structural steel & welds) and a 1-year warranty on other parts.
Shipping Note: Please note that it ships in two packages and may arrive separately.
Customer Reviews
Pleasantly surprised. I was a little leary of buying, but after several reviews and watching several videos I decided to purchase and try it for myself. I was shock at how well this machine is built, and how well it works. I so glad I didn't purchase a selectorized machine because this leg extension has an amazing strength curve. I definitely recommend to anyone wanting a quality budget machine.
Leg extension is crooked on right side down about 3/4”. Replacement part was sent and still crooked. Otherwise very solid machine. Just wish the leg pad was straight. Very important for leg development evenly
Nick in customer service that I’ve been talking to is very professional and seemed to care about my complaints
UPDATE— Lionscool sent me another part that completely eliminated the problem. Leg part is no longer crooked. They are a 5 star company. They didn’t have to fix the part but they did because they truly care about the customer. I am so impressed by their service. Rest assured that they will take care of any problems if they arise. Also the machine is great. Smooth as any leg extension I’ve ever used. Highly recommend!!
Great machine top to bottom. Affordable and customer service is top tier. A+.
So far so great. I loved that it came with a spare cable.
This leg extension has been awesome 👌. I use it twice a week. Its very solid and feels comfortable. It holds a good amount of weight. Im 6'2" 260lbs and I have no issues with height or stability. Definitely a great buy👍
FAQ
What is the difference between Lionscool V3 and V4?
The V4 brings significant improvements over the V3 for enhanced stability, durability, and user experience:
Reduced Gaps and Tolerances: We've minimized the gaps between components, creating a tighter connection for superior stability and equal tension on both legs.
Strengthened Weight Arm Junction and Balanced Weight Horn Design: The connection between the weight arm and frame is reinforced for enhanced durability and lifetime alignment stability. The weight horn is now a dual-sided design, effectively preventing weight plate slippage during use.
Upgraded Aluminum Pulley: The pulley has been upgraded to a durable aluminum one, ensuring lifetime longevity.
More Flexible Adjustment: The V4 features 9 adjustment positions on the cam (compared to 7 on the V3). The foot roller can now be freely rotated to adjust its orientation inward or outward and then fixed with a peg for personalized comfort.
Fit for Taller Users: We've lengthened the movement arm and foot roller frame to ensure the foot roller pad comfortably conforms to the ankles of taller individuals.
Enlarged Base: The rectangular base is enlarged with extended rear feet, significantly increasing overall stability.
What muscles do leg extensions work?
The leg extension is an isolation exercise that specifically targets the quadriceps femoris, the large muscle group at the front of your thigh. This group is composed of four distinct muscles: the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. All four of these muscles work together to perform knee extension, which is the primary movement of this exercise, making it highly effective for building strength and definition in your quads.
Are leg extensions bad for knees?
Using the Lionscool Leg Extension is a highly effective way to isolate and strengthen the quadriceps muscles at the front of your thighs. We understand the common concern regarding knee safety. When performed correctly, the leg extension is a safe exercise. The key is to select an appropriate weight and to avoid using momentum or jerky motions. At the peak of the movement, keep your knees slightly bent instead of fully locking them to ensure the tension remains on your muscles, not your joints. By focusing on slow, controlled movements, you can effectively build quadriceps strength. Stronger quads actually contribute to greater knee stability, which helps protect the joint. If you have a history of knee injuries, we recommend consulting with a doctor or physical therapist before use.
What is the warranty policy?
We offer a 2-year warranty on core components and lifetime technical support. In case of a faulty component, we commit to a 24-hour response time for replacement part shipment.
What should I do if a component is damaged?
Should you encounter any quality issues, we're here to help. For example, in a recent case, customer A received a free replacement for a damaged component. Please refer to our service flow chart for the detailed process.
FAQ
What is the difference between Lionscool V3 and V4?
The V4 brings significant improvements over the V3 for enhanced stability, durability, and user experience:
Reduced Gaps and Tolerances: We've minimized the gaps between components, creating a tighter connection for superior stability and equal tension on both legs.
Strengthened Weight Arm Junction and Balanced Weight Horn Design: The connection between the weight arm and frame is reinforced for enhanced durability and lifetime alignment stability. The weight horn is now a dual-sided design, effectively preventing weight plate slippage during use.
Upgraded Aluminum Pulley: The pulley has been upgraded to a durable aluminum one, ensuring lifetime longevity.
More Flexible Adjustment: The V4 features 9 adjustment positions on the cam (compared to 7 on the V3). The foot roller can now be freely rotated to adjust its orientation inward or outward and then fixed with a peg for personalized comfort.
Fit for Taller Users: We've lengthened the movement arm and foot roller frame to ensure the foot roller pad comfortably conforms to the ankles of taller individuals.
Enlarged Base: The rectangular base is enlarged with extended rear feet, significantly increasing overall stability.
What muscles do leg extensions work?
The leg extension is an isolation exercise that specifically targets the quadriceps femoris, the large muscle group at the front of your thigh. This group is composed of four distinct muscles: the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. All four of these muscles work together to perform knee extension, which is the primary movement of this exercise, making it highly effective for building strength and definition in your quads.
Are leg extensions bad for knees?
Using the Lionscool Leg Extension is a highly effective way to isolate and strengthen the quadriceps muscles at the front of your thighs. We understand the common concern regarding knee safety. When performed correctly, the leg extension is a safe exercise. The key is to select an appropriate weight and to avoid using momentum or jerky motions. At the peak of the movement, keep your knees slightly bent instead of fully locking them to ensure the tension remains on your muscles, not your joints. By focusing on slow, controlled movements, you can effectively build quadriceps strength. Stronger quads actually contribute to greater knee stability, which helps protect the joint. If you have a history of knee injuries, we recommend consulting with a doctor or physical therapist before use.
What is the warranty policy?
We offer a 2-year warranty on core components and lifetime technical support. In case of a faulty component, we commit to a 24-hour response time for replacement part shipment.
What should I do if a component is damaged?
Should you encounter any quality issues, we're here to help. For example, in a recent case, customer A received a free replacement for a damaged component. Please refer to our service flow chart for the detailed process.