Lipids, a chemical family that includes cholesterol and fat, make up a major part of the average human diet. At 9 calories per gram -- compared to 4 calories per gram of carbohydrates and proteins -- fats serve as concentrated sources of energy to fuel your active lifestyle.
The Development of Rowing Equipment By Bill Miller This page contains information about the development of rowing equipment beginning about the end of the 18th century.
1 This is an inefficient use of energy and leads to discomfort.  Rowing should not put strain on your back. Swinging from the hips allows for a smooth transition from driving with the legs to pulling in with the arms. Although there is lean forward and backward throughout the stroke, the back should always be straight.