As a common neurotransmitter used by the brain to relay signals from one area to another, serotonin influences many psychological functions. From mood and temperature regulation to sexual desire and appetite, serotonin is integral to daily life.
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Back dimples, or Venus dimples, are desirable indentations on either side of the spine just above the butt. Back dimples are caused by a visible cleft in the sacroiliac joint and are widely believed to be genetic. However, a high percentage of lean athletes sport Venus dimples.
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Both recruits and active members of the U.S. Army are required to pass the Army Physical Fitness Test, or APFT. The APFT consists of three events -- pushups, situps and a two-mile run. High Army PT test scores are required for advancing rank and earning slots in coveted military training schools.
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Relatively cheap and safe, creatine helps to replenish ATP -- the main energy source for cells -- during intense exercise. Unlike with many supplements, you do not experience the effects of creatine instantaneously. Your cells store creatine for future use, keeping your muscles saturated for when you need it the most.
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Americans -- competitive athletes in particular -- spend an estimated $14 million yearly on products containing creatine. The body stores creatine in the muscles as phosphocreatine, but during intense exercise it is converted into ATP -- one of the major energy sources for human performance.
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Amino acids, the building blocks of protein, are essential for the female body. While most of the 21 amino acids are produced by the body, nine so-called essential amino acids can only be obtained through diet.
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Protein may be the foundation of muscle, but amino acids are the building blocks of protein. Your body uses 21 different amino acids to create all of the different proteins necessary for tissue function.
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