Like all machines in the range the water rower m1 hi rise uses paddles to connect to a moving mass of water simulating the exercise of rowing on a lake or river rowing has long been recognised as the most complete aerobic exercise using a water rower works 84 of the muscle mass more than any other exercise rowing recruits all major muscle groups maximises gain minimise time derive maximum benefit from an all body workout and burn more calories in less time kind to the body no impact or