Rowing is a highly aerobic activity which burns calories quickly and gives you a complete cardiocascular workout which is a great way to help your heart as well as tone your arms, legs, chest, back, and abs. What most people don't realize is that Rowing improves joint health through a wide range of motion and relieves stress because it allows you to remove yourself from the world around you, to connect to the calm and quiet of the water, and to meditate through the rhythmic, repetitive motion of your stroke. Rowing is a great way to get Aerobic and Anaerobic benefits without even thinking about it. Rowing also provides a workout for a variety of different muscles and joints in your body. If you want to see improvements in both your cardio fitness levels and your overall strength, it can give you the desired results you're looking for.
The rowing machine itself is unlike any other on the market with its patented water filled flywheel. It is hard to exactly copy the action of a scull on the water, but the mechanics of the flywheel spinning in water comes in a close second on dry land. The fact that the water is 800 times denser than air means that there is no need for any extra resistance or dampening that you will find in normal air rowers. The faster you pull, the more resistance is generated giving it infinite variability. However, if you want to be able to practice rowing with a faster stroke, you will have to reduce the amount of water in the tank unlike an air rower where you just have to adjust the baffle.