Dual Leg Extension and Prone Leg Curl Machine | BodyKore (GR643)

Train Quadriceps and Hamstrings on One Selectorized Machine

The BodyKore GR643 combines leg extension and prone leg curl exercises into one selectorized strength machine, allowing users to train 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 reducing the amount of floor space required for dedicated lower-body isolation machines.

The GR643 is well suited for commercial fitness centers, schools, universities, apartment fitness rooms, hotels, corporate wellness facilities, personal training studios, and home gyms seeking commercial-quality selectorized lower-body equipment.

Selectorized Resistance System

The standard GR643 includes a 220 lb. selectorized weight stack that allows resistance adjustments using a selector pin rather than manually loading weight plates. This enables users to change resistance quickly while helping keep the training area organized and efficient.

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

Optional 340 lb. Weight Stack Upgrade

Facilities serving advanced athletes or stronger users can equip the GR643 with an optional 340 lb. selectorized weight stack. The upgrade is sold separately and provides additional resistance while maintaining the machine's compact footprint.

Unless specifically selected during purchase, the optional weight-stack upgrade is not included with the standard machine.

Leg Extension Exercise

The leg extension station isolates the quadriceps through a controlled seated movement designed to provide smooth resistance throughout the exercise. Adjustable positioning helps accommodate users of different sizes while supporting consistent exercise mechanics.

Prone Leg Curl Exercise

The prone leg curl station targets the hamstrings using a face-down body position that provides stable support throughout the movement. Combining prone leg curls and leg extensions into one selectorized machine allows balanced lower-body training while reducing equipment requirements.

Commercial Construction

The GR643 is built using heavy-duty steel construction, commercial-grade upholstery, and precision selectorized components designed for repeated daily use. The selectorized design allows users of varying strength levels to adjust resistance quickly, making the machine well suited for shared training environments.

Dimensions and Facility Planning

The assembled machine measures approximately 61 inches long, 44 inches wide and 65 inches high. Its compact footprint allows facilities to provide two important lower-body isolation exercises without dedicating space to separate selectorized machines.

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

Floor Planning

The GR643 weighs approximately 507 pounds. Install the machine on a stable indoor surface suitable for commercial strength equipment.

Commercial interlocking rubber gym tiles 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 assembly, prone pad, and exercise 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 moves smoothly throughout the complete exercise range.

Shipping and Receiving

The GR643 ships by commercial freight. Before shipment, verify unloading requirements, liftgate service, delivery access, and final equipment placement.

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 GR643 is an excellent choice for buyers who want both leg extension and prone leg curl exercises in one selectorized machine. Facilities expanding lower-body strength training may also consider the BodyKore GR632 Dual Hip Adductor & Abductor Machine, the BodyKore GR631 Dual Leg Press & Calf Extension Machine, or the BodyKore GR624 Selectorized Hip Thrust Machine. 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.