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.

Decreasing  speed of waves as water becomes shallow has dramatic consequences on the beach. As the waves slow, their profile (Figure on right) is laterally compressed and since each wave must carry the same energy it becomes higher. As the wave approaches shore this process continues until the height exceeds 1/7 th the wave length and the wave becomes unstable. Then the wave breaks.
An 'oar' is often referred to as a blade in the case of sweep oar rowing and as a scull in the case of sculling. A sculling oar is shorter and has a smaller blade area than the equivalent sweep oar. The combined blade area of a pair of sculls is however greater than that of a single sweep oar, so the oarsman when sculling is working against more water than when rowing sweep-oared. He is able to do this because the body action in sculling is more anatomically efficient (due to the symmetry).
The coxswain (or simply the cox) is the member who sits in the boat facing the bow, steers the boat, and coordinates the power and rhythm of the rowers - by communicating to the crew through a device called a cox box and speakers. They usually sit in the stern of the boat, except in bowloaders where the coxswain lies in the bow. Bowloader are usually seen as the coxed four and coxed pair type of boat.
In sweep or sweep-oar rowing, each rower has one oar, held with both hands. This is generally done in pairs, fours, and eights. In some regions of the world, each rower in a sweep boat is referred to either as port or starboard, depending on which side of the boat the rower's oar extends to. In other regions, the port side is referred to as stroke side, and the starboard side as bow side; this applies even if the stroke oarsman is rowing on bow side and/or the bow oarsman on stroke side.