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IFBB - International Federation of Bodybuilders, founded in 1946 - group that over-sees worldwide men's and women's amateur and professional bodybuilding.Inosine - A purine nucleotide that promotes oxygen transport and the release of oxygen molecules into the red blood cells. Also promotes production of adenosine triphosphate (ATP) which is essential for muscle function.
Inositol - This vitamin is used for cholesterol and fat metabolism, cholesterol reduction, lecithin information, hair growth, and retardation of artery hardening.
Intensity - The relative degree of effort that you put into each set of every exercise in a bodybuilding workout. The more intensity you place on a working muscle, the more quickly it will increase in hypertrophy. The most basic methods of increasing intensity are to use heavier weights in good form in each exercise, do more reps with a set weight, or perform a consistent number of sets and reps with a particular weight in a movement, but progressively reducing the length of rest intervals between sets.
Ion Exchange - A technique of separating materials by reversible interchange between ions of like charge.
Iron (Fe) - This mineral is used for hemoglobin production, stress and disease resistance.
Isokinetic Exercise - Isotonic exercise in which there is ACCOMMODATING RESISTANCE. Also refers to constant speed. Nautilus and Cybex are two types of isokinetic machines, where machine varies amount of resistance being lifted to match force curve developed by the muscle.
Isometric Exercise - Muscular contraction where muscle maintains a constant length and joints do not move. These exercises are usually performed against a wall or other immovable object.
Isolation Exercise - In contrast to a basic exercise, an isolation movement stresses a single muscle group (or sometimes just part of a single muscle) in relative isola-tion from the remainder of the body. Isolation exercises are good for shaping and defining various muscle groups. For your thighs, squats would be a typical basic move-ment, while leg extensions would be the equivalent isola-tion exercise.
Isotonic Exercise - Muscular action in which there is a change in length of muscle and weight) keeping tension constant. Lifting free weights is a classic isotonic exercise.
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