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ONYX Leg Extension

$2,499.00
By VO3 Fitness

The ONYX Leg Extension is a premium plate-loaded strength machine engineered specifically for quadriceps development with smooth, controlled knee extension performance. Built for commercial gyms and high-end personal training studios, its modern aesthetic and solid construction support reliable training in high-traffic environments.

An ergonomically contoured backrest is infinitely adjustable to accommodate users with different leg lengths, ensuring correct posture alignment and stable support throughout the full range of motion. A wide seat pad improves comfort for users with varying leg circumferences, while the ergonomically designed ankle roller follows the natural movement path of the lower leg for effective, joint-friendly quad activation. An isolated arm design supports unilateral training to reduce compensation and promote balanced strength development between both legs.

  • Plate-Loaded Leg Extension: Designed for isolated quadriceps training and controlled knee extension strength.
  • Infinitely Adjustable Backrest: Easily adapts to different leg lengths for optimal posture alignment and training comfort.
  • Wide Seat Pad: Comfortable support for users with varying leg circumferences, improving stability during heavy sets.
  • Ergonomic Ankle Roller: Aligns with natural lower-leg movement path for smooth, effective quad activation.
  • Isolated Arm Design: Supports unilateral training to reduce compensation and promote balanced left/right strength development.
  • Stable Commercial Construction: Reinforced build designed for high-frequency use in commercial gym environments.
  • Leg Extension: Primary quad isolation movement to build knee extension strength and muscle definition.
  • Quadriceps Hypertrophy: Ideal for controlled volume training to build quad size, shape, and endurance.
  • Strength Development: Plate-loaded progression supports heavier training and progressive overload programming.
  • Unilateral Quad Training: Train one leg at a time to improve symmetry and correct muscular imbalances.
  • Lower-Body Accessory Work: Complements squats, leg press, hack squat, and athletic performance routines.
  • Dimensions (L × W × H): 63.0 × 63.0 × 49.6 in
  • Total Weight: 243 lb
  • Resistance Type: Plate-loaded
  • Target Muscle Groups: Quadriceps (primary)
  • Intended Use: Commercial gyms and high-traffic training facilities
  • Infinitely adjustable backrest supports proper alignment for more effective quad training
  • Ergonomic ankle roller improves comfort and ensures smoother reps
  • Isolated arms enable unilateral training to build balanced lower-body strength
  • Commercial-grade construction designed for daily high-traffic use
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