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OBS-SP20 Isolated Leg Extension Machine

This commercial-grade isolated leg extension machine features a dual independent design, ergonomic padded seat, and plate-loaded resistance system. It delivers targeted quadriceps training with smooth natural movements, ideal for gyms to build leg strength and muscle definition while allowing unilateral training.
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  • OBS-SP20

  • OBISON

1. Product Details

Key Components & Features

SP49 分动式伸腿 (1)_2

Adjustable Thigh & Ankle Padding

Padded thigh supports and soft ankle rollers, comfortably securing the legs and preventing slippage during training.

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Ergonomic Padded Seat & Backrest

Contoured red padding with high-density foam, providing stable torso and lower back support during leg extension movements, reducing fatigue and maintaining correct posture.

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Plate-Loaded Resistance System

Side weight storage pegs and loading bar, compatible with standard Olympic weight plates for quick resistance adjustment to suit different training intensities.


2. Product Specifications

Item Details
Product Name Isolated Leg Extension Machine
Product Model OBS-SP20
Machine Dimensions (LWH) 130018001500mm
Packaging Dimensions 13001300700mm
Net Weight 225 kg
Gross Weight 270 kg
Color Options Customizable (Red/Black as default)
Logo Customization Available (OEM/ODM supported)
Main Frame Tubes 501003.0mm square tube, φ703.0mm & φ603.0mm round tube
Padding Material High-density foam + wear-resistant PU leather
Frame Finish Powder-coated (anti-rust, scratch-resistant)
Suitable For Commercial gyms, fitness centers, rehabilitation studios
Assembly Semi-assembled (easy to install with step-by-step manual)
Handle Material Steel core + non-slip rubber grip
Weight Storage 6 side pegs for standard Olympic weight plates
Padding Color Red (customizable)


3. Target Muscle Groups

This isolated leg extension machine primarily targets the quadriceps femoris (front of thighs). The dual independent design allows for unilateral training, making it ideal for correcting muscle imbalances and isolating each leg’s quadriceps, while also engaging core stabilizer muscles to maintain balance during single-leg movements.

4. Commercial Gym Value

Designed for high-traffic commercial gyms, the OBS-SP20 fills a key gap in leg training by offering isolated unilateral training. It caters to users recovering from injuries, athletes correcting muscle imbalances, and fitness enthusiasts targeting quadriceps definition. Its durable construction and low maintenance requirements make it a cost-effective investment for maximizing member satisfaction and space efficiency.

5. Key Advantages

  • Isolated Unilateral Training: Dual independent mechanisms allow single-leg training, correcting muscle imbalances and maximizing quadriceps activation.

  • Joint-Friendly Design: Smooth mechanical motion reduces stress on knee joints, suitable for users of all fitness levels, including those in rehabilitation.

  • Targeted Quadriceps Focus: Isolates the front of the thighs, avoiding engagement of other leg muscles for precise muscle growth and strength gains.

  • Brand Customization: Flexible color and logo options let gym owners align the machine with their brand identity and facility aesthetics.

  • Compact Footprint: Space-efficient design fits well in standard gym layouts without occupying excessive floor space.


6. FAQ (Frequently Asked Questions)

Q1: What muscle groups does this machine train?

A: It primarily targets the quadriceps femoris (front of the thighs). The dual independent design allows for unilateral training to correct muscle imbalances.

Q2: Is this machine suitable for commercial gym use?

A: Yes, it is built with commercial-grade thick steel tubes and a reinforced frame to withstand high-frequency, heavy-use environments.

Q3: How do I adjust the training resistance?

A: Simply add or remove standard Olympic weight plates from the side storage pegs or central loading bar to adjust resistance levels quickly.

Q4: Can I customize the color and add my gym's logo?

A: Yes, we offer full color customization (red/black and other options) and logo branding services to enhance your gym's brand presence.

Q5: Is this machine suitable for users recovering from knee injuries?

A: Yes, the smooth, controlled motion and isolated design make it a safe option for users recovering from knee injuries, under the guidance of a healthcare professional.

7. Packaging & Shipping

  • Packaging: Multi-layer protection (foam padding + thick carton box + optional wooden frame) to prevent scratches and damage during long-distance transportation.

  • Lead Time: 15-20 working days after deposit confirmation, with expedited production available for urgent orders.

  • Shipping Method: Suitable for LCL/FCL sea freight. The semi-assembled design reduces packaging volume, helping to lower logistics costs.


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