Dual Leg Curl and Leg Extension Machine | BodyKore (GR639)

Train Quadriceps and Hamstrings on One Machine

The BodyKore GR639 combines leg extension and seated leg curl exercises into one selectorized machine, allowing users to strengthen both the front and back of the upper legs without moving between separate pieces of equipment. Its dual-function design helps maximize workout efficiency while conserving valuable floor space in commercial and residential fitness facilities.

The GR639 is well suited for commercial gyms, schools, universities, apartment fitness centers, hotels, corporate wellness facilities, personal training studios, and home gyms seeking commercial-quality selectorized lower-body equipment.

Selectorized Weight Stack

The standard configuration includes a 220 lb. selectorized weight stack that allows resistance changes using a selector pin instead of manually loading weight plates. This simplifies weight adjustments, keeps workouts moving efficiently, and reduces equipment setup time between users.

Because selectorized equipment uses pulleys and leverage systems, the resistance experienced during exercise may differ from the labeled stack weight. Users should always choose an appropriate resistance level for their training goals.

Optional 340 lb. Weight Stack Upgrade

Facilities serving advanced athletes or stronger users can equip the GR639 with an optional 340 lb. selectorized weight stack. The upgrade is sold separately and provides additional training resistance while maintaining the machine's overall footprint.

Leg Extension Exercise

The leg extension station isolates the quadriceps through a controlled seated movement designed to provide smooth resistance throughout the exercise. The adjustable seat and roller pad help accommodate a variety of users while supporting proper exercise positioning.

Seated Leg Curl Exercise

The seated leg curl function targets the hamstrings through a controlled flexion movement using the same selectorized resistance system. Combining both exercises into one machine allows balanced lower-body training while reducing the amount of equipment required.

Commercial Construction

The GR639 is built with heavy-duty steel construction, commercial-grade upholstery and precision selectorized components designed for repeated daily use. The selectorized system allows users of different strength levels to change resistance quickly, making the machine well suited for shared training environments.

Dimensions and Facility Planning

The assembled machine measures approximately 68 inches long, 50 inches wide and 65 inches high. Its compact design makes it easier to incorporate into strength training layouts while still providing dual lower-body exercise capability.

Before ordering, verify ceiling height and measure all delivery paths including exterior doors, interior doors, hallways, elevators, stairways, and the final installation area.

Floor Planning

The GR639 weighs approximately 582 pounds. Install the machine on a stable indoor surface appropriate for commercial fitness equipment.

Commercial rubber gym flooring can help protect finished floors and improve equipment placement, but flooring does not determine structural load capacity. Facilities with upper-level installations should verify structural suitability before delivery.

Assembly and Installation

Assembly is required. Install the frame, guide rods, weight stack, pulleys, cables, seat assemblies, and adjustment components according to the current BodyKore instructions before placing the machine into service.

After assembly, verify that all hardware is secure, the selector pin engages correctly, and the weight stack travels smoothly through its full range of motion.

Shipping and Receiving

The GR639 ships by commercial freight. Before shipment, verify unloading requirements, liftgate needs, delivery access, and final equipment placement to help ensure a smooth installation process.

Standard freight service should not be assumed to include inside delivery, room placement, unpacking, debris removal, or assembly unless those services are specifically arranged.

Warranty Overview

The warranty includes lifetime coverage on the frame excluding coatings, ten years on weight stacks, pulleys and pivot bearings, three years on components not otherwise specified, one year on upholstery, cables, springs and grips, and six months on accessories.

Compare Similar Lower-Body Equipment

The GR639 is an excellent choice for buyers who want both leg extension and leg curl exercises in one selectorized machine. Facilities seeking other lower-body strength equipment may also consider the BodyKore GR631 Dual Leg Press & Calf Extension Machine, the BodyKore FL1834 Belt Squat Machine, or the BodyKore MX1182XL Squat Box Pro Portable Belt Squat Station. You can also browse our complete selection of Selectorized Strength Equipment.

Ordering Assistance

Need help selecting the right selectorized lower-body equipment? Visit IRON COMPANY Customer Care or contact our equipment specialists for assistance with product selection, freight planning, and ordering.