Spirit Fitness SP-4317 Standing Calf Extension

Product Overview

The Spirit Fitness SP-4317 Standing Calf Extension is engineered to deliver powerful, focused calf development through a natural upright movement pattern. Designed for commercial environments, it combines biomechanical precision, user stability, and durable construction to ensure safe and effective lower-leg training.

Its upright position allows users to train the calf muscles across both the knee and ankle joints, maximizing muscle activation and functional strength. With adjustable shoulder pads and a non-slip foot platform, the SP-4317 provides secure positioning and full range of motion, making it ideal for gyms, performance facilities, and rehabilitation settings.

PIN: SP-4317

Key Features

• Full Range Hamstring Activation
  Prone positioning allows effective training across both hip and knee joints for complete muscle engagement.
• Angled Hip Stabilization Pads
  Prevents hip lifting during movement, ensuring proper alignment and controlled execution.
• Adjustable Leg Pad & Range of Motion
  Accommodates users of all sizes and flexibility levels for customized training.
• Smooth Selectorized Resistance
  Provides consistent, controlled resistance suitable for all fitness levels.
• Micro Weight Increment System
  Fine-tuned resistance adjustments support progressive overload and precise training.
• Integrated Rep Counter & Storage
  Tracks workout performance and includes top-cap storage for convenience.
• Ergonomic Comfort & Support
  High-density foam pads with premium upholstery enhance comfort and durability.
• Compact Commercial Design
  Space-efficient footprint maximizes gym floor utilization without compromising performance.

Specifications

Performance

• Resistance Type: Selectorized weight stack
• Weight Stack: 115 kg (250 lb)
• Increment: 5 lb (2.2 kg)

Design & Build

• Frame: Heavy-gauge commercial steel
• Movement: Prone hamstring curl
• Pads: Angled hip stabilization + adjustable leg roller

Dimensions & Capacity

• Product Size: 1725 x 1278 x 1500 mm
• Product Weight: ~239 kg
• Maximum User Weight: ~180 kg (typical commercial standard)