Bodyworx KSX850 Ski Erg
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- Specifications
Ski trainers sit in a category most people haven't tried yet — and that's exactly why they're worth considering. The KSX850 delivers the same full-body, high-intensity, low-impact workout that makes air rowers so effective, but in a standing pull format that hits your posterior chain, core, and upper body differently. If you're looking for a serious conditioning machine that won't wreck your joints, this is one of the most underrated options on the market.
Top 3 Selling Points
- Dyneema® cable — 15x stronger than steel by weight — the pull cable is the part of a ski trainer that takes the most punishment. Dyneema is the same fibre used in climbing ropes and marine applications. It won't fray, stretch, or snap under hard, repeated use. It's a meaningful component choice that most people don't think to ask about until something cheaper fails.
- Dual resistance control — 9-level air dampener plus effort-based fan resistance — the air dampener adjusts the volume of air over the flywheel vanes, giving you a set baseline resistance level before you start pulling. Layer your own effort on top of that and you have a machine that scales from active recovery all the way to maximal power output without limitation.
- One of the most comprehensive consoles in its class — time, time/500m split, average split, stroke rate, distance, projected 30-min distance, calories, calories/hr, watts, average watts, pulse, drag, and cycle. That's not a spec list to impress — those are the metrics serious conditioning athletes actually train to.
The KSX850 is built around the same principle as a high-end air rower: resistance scales directly with effort, which means there's no ceiling and no coasting. The standing pull position recruits the glutes, hamstrings, spinal erectors, lats, and arms simultaneously — it's one of the few cardio machines that genuinely qualifies as a full-body strength-endurance tool rather than just a leg-dominant cardio machine.
The air dampener is what separates this from a basic ski trainer. By controlling the vent opening — larger for higher resistance, smaller for lower — you can dial in a consistent drag factor before you start. This matters for structured training, where you want repeatability session to session. Bluetooth FTMS means you can connect to Kinomap and compatible platforms for coached sessions and data logging, with the added benefit of Bluetooth software updates keeping the machine current over time.
The main frame is 2mm steel at 103.4cm x 55.5cm, with a 25mm floor stand and 3mm handlebar construction — these are commercial-grade material thicknesses. An optional floor stand base (KSX850BASE) is available separately for those who want a fixed floor-mounted setup rather than wall-mounted.
Resistance: 9-level air dampener + effort-based fan resistance
Cable: Dyneema® (15x stronger than steel by weight)
Console: Backlit LCD
Console Metrics: Time, Time/500M, AVG Time/500M, Split Time/500M, Strokes, Strokes/min, Distance, Projected Distance/30min, Estimated Calories, Calories/HR, Split Calories, Pulse, Drag, Cycle, Watts, AVG Watts
Programs: Quick Start, Distance, Calories, Time (Countdown & Interval), Workout Memory, Bluetooth FTMS
Connectivity: Bluetooth FTMS (Kinomap compatible) + Bluetooth software update
Main Frame: 103.4cm (L) x 55.5cm (W) x 2mm steel
Floor Stand: 120cm (L) x 59cm (W) x 25mm
Handlebar: 49cm (L) x 70cm (W) x 3mm
Assembled Dimensions: 135cm (L) x 61cm (W) x 215.9cm (H)
Additional Features: Smartphone holder, optional floor base (KSX850BASE sold separately)
Product Code: KSX850
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