Spirit Fitness SP-3505 Seated Leg Curl

Product Overview

The Spirit Fitness SP-3505 Seated Leg Curl is a commercial-grade strength machine engineered to isolate and strengthen the hamstrings through a controlled seated movement. Designed for optimal biomechanics, it aligns the knee joint precisely with the machine’s axis of rotation while promoting stability and full muscle contraction. With its ergonomic pad system, smooth resistance, and durable construction, the SP-3505 delivers efficient, safe, and consistent lower-body training for professional fitness environments.

PIN: SP-3505

Key Features

• Precision Hamstring Isolation
  Seated movement pattern ensures targeted engagement of the hamstrings with controlled execution.
• Adjustable Roller & Back Pads
  Provide accurate alignment with the knee joint, supporting proper biomechanics and user comfort.
• Angled User Positioning
  Enhances stability during exercise, helping maintain correct posture and reducing unwanted movement.
• Full Contraction Seat Design
  Seat pad is optimized to allow complete hamstring activation through the full range of motion.
• Adjustable Range of Motion
  Accommodates different flexibility levels and training needs, including rehabilitation use.
• Smooth Cable-Driven Resistance
  Ensures fluid, consistent motion throughout every repetition for safe and effective training.
• Integrated Storage Convenience
  Built-in top-cap tray keeps essentials like phones and water bottles within easy reach.
• Commercial-Grade Durability
  Heavy-duty steel frame and premium upholstery built for long-term use in high-traffic gyms.

Specifications

Performance

• Exercise Type: Seated leg curl (hamstring 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: Hamstrings, with secondary activation of glutes and calves 

Design & Build

• Frame: Heavy-duty commercial-grade steel
• Finish: Durable powder-coated surface
• Pads: Adjustable roller and back pads for proper alignment
• Seat: Ergonomic design for full muscle contraction
• Mechanics: Adjustable range-of-motion system
• Cushioning: High-density foam with premium upholstery
• Convenience Features: Storage tray, enclosed weight stack 

Dimensions & Capacity

• Dimensions (L × W × H): 1156 × 1407 × 1592 mm (46" × 55" × 63")
• Machine Weight: 277 kg / 612 lb
• Weight Stack: 110 kg / 240 lb
• Maximum Selectable Load: 110 kg / 243 lb
• Footprint: Compact commercial design suitable for strength circuits