Yes, they break, and they don't last very long!. I fell the first time too; fortunately (not for the wardrobe), a wardrobe door cushioned the fall. I replaced the bands (and a right pig they are to replace). I am just replacing them again, so this is the third set, and at £110 + £12 postage, they ain't cheap. This is the Achilles heel of the Skier's Edge - since the previous set lasted so badly, I left the machine unused for two years.
The reason they are hard to replace is that you have to stretch the long band whilst refitting the end roller, and the end roller axle design is crap!! The axle goes only partway through the roller, so you have to stretch, AND HOLD!!! the band, keeping the axle at exactly 90 degrees so that it lines up with the hole at the other side of the frame, then you have to try to screw the retaining screw (which provides the other axle bearing surface) in from the other side. The retaining screw has a shakeproof washer, which falls off given half a chance (not helpful). If you try to do this on your own, it is close to impossible. I ended up using a ski pole through the band, and a pair of twin-tip skis as levers to stretch the band, then I inserted the roller (not easy) into the band, then pushed down like crazy to get the roller to line up with the hole (also not easy), then finally got the stupid thing to screw together (also, you guessed it). All while using my shoulder to hold the twin-tips in place. This a joke guys! Describing this arrangement as crap, doesn't come close!
Suggested design change:
Why don''t they bring the axle all the way through both sides, so that all you need to do is locate the axle in the frame, then the axle takes the strain and you screw a retainer into the end, or use the same arrangement as used for the small band rollers? This isn't hard to work out!