Spirit Fitness IS-2003 Leg Extension / Leg Curl

The Spirit Fitness IS-2003 Leg Extension / Leg Curl is a next-generation dual-function strength machine designed to deliver precise, efficient lower-body training in a compact footprint. Powered by Spirit’s i-Strength digital resistance system, it replaces traditional weight stacks with a servo-controlled mechanism, offering smooth, quiet, and highly accurate resistance.

Engineered for versatility and user convenience, the IS-2003 allows seamless switching between leg extension and leg curl exercises without leaving the seated position. With intelligent training modes, real-time feedback, and optimized biomechanics, it is ideal for performance training, rehabilitation, and premium commercial fitness environments.

PIN: IS-2003

Dual-Function Lower Body Training
Combines leg extension and leg curl in one machine to effectively target quadriceps and hamstrings.

Servo-Motor Digital Resistance
Replaces weight stacks with smooth, precise electronic resistance and micro-adjustments for accurate loading.

Four Intelligent Training Modes
Includes Pure, Eccentric, Isokinetic, and Elastic modes for strength, power, endurance, and rehab training.

Seated Exercise Transition
Users can switch between exercises without leaving the seat, improving efficiency and workout flow

Optimized Axis of Rotation
Designed to align with natural joint movement for smooth, safe, and biomechanically correct motio

Interactive Touchscreen Console
Provides real-time performance feedback, resistance control, and guided training programs

Smooth, Silent & Low-Maintenance Operation
No cables, pulleys, or weight stacks—reducing noise and maintenance requirements.

Commercial-Grade Construction
Heavy-duty steel frame ensures durability and long-term performance in high-use facilities.

Technical Specifications

Console & Technology

Display: 7”–10.1” touchscreen console
Features: Real-time feedback, guided workouts, OTA updates
Connectivity: Wi-Fi, Bluetooth, Spirit+ ecosystem

Performance

Resistance Type: Electromechanical servo motor
Resistance Range: Approx. 18 – 205 lb (8 – 93 kg)
Training Modes: Pure, Eccentric, Isokinetic, Elastic

Design & Build

Frame: Heavy-gauge commercial steel
Seat: Adjustable padded seat for ergonomic support
Movement: Seated dual-function with optimized pivot alignment

Power

Power Supply: AC 110–240V

Dimensions & Capacity

Product Size: Approx. 1665 x 1410 x 1131 mm
Product Weight: ~158 kg
Maximum User Weight: ~350 lb (159 kg)

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