Hoist Triceps Extension - RS-1103 Platinum
Dynamic adjustment is the essence behind the ROC-IT line from HOIST. Using ROX technology, the user becomes an integral part of the exercise by continuously adjusting the position of the user with the movement of the exercise arm. As a result, the ROC-IT line embodies a unique training experience that achieves the unrestricted joint movement and core activating benefits of functional training coupled with the stabilizing benefits of machine-based equipment. Try it out for yourself and experience the ride of the ROC-IT line!
What our Experts Think
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Elite smart-motion triceps isolation
The RS-1103 Platinum is a HOIST ROC-IT machine that uses dynamic ROX technology to subtly shift the user during movement, creating a more natural and joint-friendly triceps extension pattern than fixed-path machines.
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Complete triceps activation design
Engineered to effectively target all three heads of the triceps, it delivers strong muscle engagement through a controlled, biomechanically guided pressing motion.
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Shoulder-friendly biomechanics under load
Adjustable handles and moving torso support help reduce excessive shoulder stress while maintaining strict form—ideal for heavy pressing without joint strain.
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Natural dip-like movement feel
The pressing action closely mimics a bar dip motion, but with added stability and guided resistance for safer progressive overload.
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Adaptive user positioning system
Features a rocking seat design and ergonomic setup that continuously adjusts body alignment during reps, improving comfort and consistency across users.
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Commercial-grade durability
Built for heavy gym use with a ~557 lb machine frame and ~178 lb weight stack, ensuring long-term stability and smooth performance under load.
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Efficient training workflow design
Includes foot assist positioning and easy weight-stack access, helping users get into proper starting position quickly and safely.
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Premium Platinum finish appeal
The Platinum version delivers a clean, high-end commercial aesthetic suited for modern strength facilities while maintaining identical performance.
Q&A
Q: What is the HOIST RS-1103 Platinum Triceps Extension used for?
A: A commercial selectorized strength machine designed to isolate and develop the triceps (all three heads) using a guided extension movement.
Q: What makes the RS-1103 different from a standard triceps machine?
A: It uses ROC-IT® / ROX™ dynamic technology, meaning the seat and torso support move with you during the press to improve muscle activation and reduce joint stress.
Q: How does the movement work?
A: As you press the handles forward, the machine rocks your upper body backward, creating a more natural extension path similar to free-weight dips while maintaining support.
Q: Is it comfortable on the shoulders and back?
A: Yes—adjustable handles and moving torso support help reduce shoulder strain and lower back pressure during heavy triceps work.
Q: What features does it include?
A: It offers contoured multi-grip handles, adjustable seat positioning, a foot assist bar for easier start position, and articulating arms for variation in movement.
Q: What is the resistance system?
A: It is a selectorized weight stack machine (~180 lb stack) for controlled, progressive resistance training.
Maintenance Tips
- Wipe pads, handles, and arm supports after each use to remove sweat and prevent upholstery wear
- Inspect and tighten all bolts, frame joints, and seat adjustment hardware regularly for safe operation
- Check ROX rocking mechanism for smooth motion and ensure no noise, sticking, or imbalance
- Lubricate pivot points and articulating arms lightly with silicone or Teflon-based lubricant as needed
- Clean contact surfaces and foot assist bar to prevent dust, chalk, and debris buildup
- Inspect weight stack, selector pin, and internal guide components for wear or misalignment
- Ensure ratcheting seat adjusts and locks securely at all positions before use
- Keep machine level, anchored, and placed in a dry, climate-controlled environment
- Do not exceed rated load and stop use if abnormal resistance or mechanical noise appears
- Schedule periodic full inspection and re-tightening for commercial gym durability
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