Spirit Fitness SP-3510 Leg Extension

Product Overview

The Spirit Fitness SP-3510 Leg Extension is a commercial-grade strength machine designed to isolate and strengthen the quadriceps through a precise, controlled extension movement. Built with user-focused biomechanics, it ensures proper knee alignment while delivering smooth, consistent resistance. With ergonomic adjustability, durable construction, and a compact footprint, the SP-3510 is a reliable solution for effective lower-body training in high-performance fitness environments.

PIN: SP-3510

Key Features

• Targeted Quadriceps Isolation
  Engineered to deliver focused muscle activation for building strength and definition in the upper leg.
• Adjustable Back Pad Alignment
  Ensures correct positioning with the machine’s axis of rotation for optimal biomechanics and reduced joint stress.
• Self-Adjusting Tibia Pad
  Automatically adapts to different leg lengths, minimizing setup time and improving user comfort.
• Adjustable Range of Motion
  Accommodates varying flexibility levels, making it suitable for general training and rehabilitation use.
• Smooth Cable-Driven Resistance
  Provides fluid, controlled motion throughout the full extension range for safe and effective workouts.
• Integrated Storage & Convenience
  Built-in top-cap storage keeps personal items easily accessible during training.
• Commercial-Grade Durability
  Heavy-duty steel frame and premium upholstery ensure long-term performance in high-traffic facilities.

Specifications

Performance

• Exercise Type: Leg extension (quadriceps isolation)
• Resistance System: Selectorized weight stack
• Weight Stack: 110 kg / 240 lb
• Increment: 7.5 lb increments
• Movement: Cable-driven system for smooth, controlled resistance
• Target Muscles: Quadriceps

Design & Build

• Frame: Heavy-duty commercial-grade steel
• Finish: Durable powder-coated surface
• Seat & Pads: Adjustable back pad with high-density foam cushioning
• Leg Pad: Self-adjusting tibia pad for ergonomic positioning
• Mechanics: Adjustable range-of-motion system
• Convenience Features: Storage tray, enclosed weight stack

Dimensions & Capacity

• Dimensions (L × W × H): 1156 × 1407 × 1592 mm (46" × 55" × 63")
• Machine Weight: 264 kg / 583 lb
• Weight Stack: 110 kg / 240 lb
• Maximum Selectable Load: Approx. 110 kg (243 lb)
• Footprint: Compact commercial design suitable for strength circuits