M1 Lo-Rise Rowing Machine is a full commercial rower backed by WaterRower's standard 3 - year commercial warranty. This frame is fabricated from hardy tubular steel, requiring minimal care or maintenance in even the toughest of environments. Using the same principles that govern the dynamics of a boat in water, the WaterRower M1 Lo-Rise rowing machine provides an unlimited range of resistance making it suitable for a variety of strength and skill levels. In a boat, the faster you move, the greater the drag and the greater the intensity of exercise required to maintain your speed. The limit to the speed you can maintain is you, your physiology, not the machine. For maximum realism and comfort, the WaterRower M1 Lo-Rise's precision sprang clutch engages the instant the handle is pulled, so there is no jerkiness or jarring at the beginning of the stroke. The WaterRower M1 Lo-Rise rowing machine leaves you with the distinct sense that you are gliding effortlessly across the water.