Magnesium (Mg) - This mineral is used for muscle relaxation, acid and alkaline balance, enzyme activation, blood sugar, calcium and vitamin C metabolism.
Manganese (Mn) - This mineral is used for carbohydrate metabolism, enzyme activation, reproduction and sex hormone production.
Mass - The relative size of each muscle group, or of the entire physique. As long as you also have a high degree of muscularity and good balance of physical proportions, muscle mass is a highly prized quality among competitive bodybuilders.
MCT - Medium Chain Triglycerides, caprylic acid source. Provides twice the energy power of proteins and carbohydrates and reduces muscle protein breakdown during recovery and healing.
Meal - Food that's eaten at one time. Each meal should contain a portion (which is the size of the palm of your hand or your clenched fist) of protein and a portion of carbohydrates.
Melatonin - A natural hormone available in synthetic form for supplementation. Used extensively as a sleep aid.
Metabolic rate - The rate you convert energy stores into working energy in your body. In other words, it's how Fast your "whole system" runs. The meta-bolic rate is controlled by a number of factors, including: muscle mass (the greater your muscle mass, the greater your metabolic rate), calorie intake, and exercise.
Metabolism - The use of nutrients by the body. It's the process by which sub-stances come into the body and the rate at which they are used.
Midsection - Muscles of abdominal area, including upper and lower abdominals, obliques and rectus abdominis muscles.
Mike Ashley - Professional natural bodybuilder who competed in the IFBB.
Mike Mentzer - Known as Mr Heavy Duty training.
Military press - Pressing a barbell from upper chest upward in standing or sitting position.
Minerals - Calcium, phosphorus, magnesium, sodium, potassium, iron and zinc, are all nutrients that perform important jobs in the body - building bones and teeth, transporting oxygen from the lungs to tissues and regulating metabolism.
Mixed Pairs Competition - Couples' competition, a rela-tively new form of bodybuilding competition in which man-woman teams compete against others with particu-larly appealing posing routines featuring adagio and other dance movements.
Mohamed Makkawy - Bodybuilder known as The Magic Egyptian.
Mr. Olympia - The Super Bowl of bodybuilding.
Muscle - Tissue consisting of fibers organized into bands or bundles that contract to cause bodily movement. Muscle fibers run in the same direction as the action they perform.
Muscle and Fitness Magazine One of the oldest bodybuilding publications started by Joe Weider.
Muscle Head - Slang for someone whose life is dominated by training.
MuscleMag International The creation of the late Robert Kennedy, who first started publishing the magazine in 1974
Muscle Media Initially titled as MM 2000, or MM2K, this magazine was launched by Bill Phillips in 1996.
Muscles (Diana Ross Song)
Muscle Spasm - Sudden, involuntary contraction of muscle or muscle group.
Muscle Tone - Condition in which a muscle is in a Constant yet slight state of contraction and appears firm.
Muscle Training Illustrated Dan Lurie bodybuilding magazine published from 1965 to 1995.
Muscular Development Magazine founded by one of the biggest names in weightlifting, Bob Hoffman.
Muscularity - An alternative term for "definition" or "cuts."
Myosin - A protein that along with actin helps the muscle contract and produce tension and work.
Myositis - Muscular soreness due to inflammation that often Occurs 1-2 days after unaccustomed exercise.
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