Like other Hydrorider pool exercise bikes, the Pro-Fix offers you a fun and easy way to get fit, especially if you want a low-impact workout option. It is one of the best ways to improve your cardio endurance while burning calories and toning your body. The Hydrorider AquaBike Pro-Fix has a four-paddle flywheel system that makes gradual changes in the resistance during your workout. It is the largest paddle available on the market, so it provides the greatest resistance. As you increase your speed, the resistance becomes more challenging. The vertical and horizontal adjustments for the seat and handlebars allow you to find the perfect position for your body. The Hydrorider AquaBike Pro-Fix is our most popular model of aqua bikes in Australia. This AquaBike can take you from a beginner to pro with just one piece of exercise equipment for the pool.