The Cybex 770AT Arc trainer is really three machines in one.At lower incline levels, it glides like a cross-country skier. In the middle, it strides like an elliptical. At higher levels, it’s a climber. This Arc Trainer produces less stress on the knees than walking, and is ideal for general exercisers, those looking for a challenging HIIT workout, and everyone in between. This just show that this machine really is for anyone ranging from beginners to athletes.