Indoor Rowing and Indoor Cycling offer the best low impact routes to aerobic full body fitness and strength, providing the highest and most effective calorie burns. The WaterRower closely simulates rowing a boat through water, and the Keiser M3 is an exercise bike with the true feel of a road bike. Both are the leaders in their field. Rowing machine hire and exercise bike hire from Rowhire: A simple, low-cost weekly hire charge and a minimum hire period of just 3 months. The best chance of succeeding in your goals.