In isometrics, the length of the muscle does not change in contraction. Charles Atlas, a world championship bodybuilder, is the most famous person who uses isometric exercises to build lean muscle. Atlas was a fan of Alois P. Swoboda, who wrote the "Conscious Evolution" Course.

Many times, people do this type of exercise and don't realize they are doing any kind of exercising. The typical housewife does this exercise when she carries her groceries in. Isometric exercises are more accomplished at creating new lean muscles tissue, and scientific studies show this can be done in as little as seven seconds.

There are many benefits attained when you increase lean muscle mass. Some of these benefits are building strong bones, lowering cholesterol and increasing weight loss. One of the biggest advantages of this type of exercise is the fact that you can do them almost anywhere, even driving down the highway. An example of this is when you sit straight in a chair and draw your stomach muscles in, hold as long as you can, and then relax. Do this several times; you'll find a reward of a flat stomach is in your future.

Isometric exercises targets a specific muscle and strengthens that muscle. Isometric exercises can be done by forcibly pushing against a solid object, such as a door. The muscle contracts without changing its length. Isometrics exercises can transform the body in a short period of time.

Isometric contractions can restrict the flow of blood and cause an elevated blood pressure. Anyone with a heart condition or hypertension would want to discuss this type of exercise regime with their doctor.