BodyKore GR639 Leg Curl/Extension

The BodyKore GR639 Leg Curl/Extension trains both primary muscle groups of the knee joint — the quadriceps (leg extension) and the hamstrings (leg curl) — from a single seated station. The machine transitions between extension and flexion resistance through a pad-position adjustment that repositions the roller arm, eliminating the need for two separate machines to cover full knee joint training. The selectorized stack and hydraulic seat adjustment make it accessible to the full range of user sizes and strength levels.

• Dimensions: 50"×68"×65"
• Machine weight: 362 lbs (frame)
• Resistance: 220 lbs stack (upgradeable to 340 lbs)
• Primary muscles: Quadriceps, Hamstrings
• 220 lb precision-cut selectorized weight stack — upgradeable to 340 lbs
• Hydraulic lift seat adjustment — fits any user instantly without tools
• Water-resistant, impact-resistant vinyl upholstery over high-density foam
• LB Guide Rod System for smooth, low-friction weight stack travel
• Urethane composite grips reduce contact-point stress and improve grip reliability
• Enclosed weight stack shields for safety without compromising aesthetics
• Built-in exercise instruction diagram for all experience levels
• Water bottle and personal items storage integrated into the machine
• Warranty: Frame: Lifetime | Weight Stacks & Pulleys: 10 Years | Upholstery/Cables/Springs/Grips: 1 Year | Accessories: 6 Months

Part of the BodyKore Isolation Series — precision-built with hydraulic lift seat adjustment, urethane composite grips, enclosed weight stack shields, water-resistant upholstery, and a built-in exercise diagram. Weight stack is 220 lbs standard, upgradeable to 340 lbs. Frame: lifetime warranty; Weight stacks & pulleys: 10 years.