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Tendinitis: inflammation of the tendon.
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Target heart rate: in an aerobic exercise program, the heart rate level that will provide the stimulus for a beneficial training effect.
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Testosterone: the male sex hormone responsible for male secondary sex characteristics at puberty; it has anabolic and androgenic effects.
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Thermic effect of exercise (TEE): increased muscular contraction produces additional heat.
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Thermic effect of food (TEF): the increased body heat production associated with the digestion, assimilation and metabolism of energy nutrients in a meal just consumed.
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Thermogenesis: the production of heat; metabolic processes in the body generate heat constantly.
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Thiamin: vitamin B1
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Threonine: an essential amino acid.
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Threshold stimulus: the minimal level of exercise intensity needed to stimulate gains in physical fitness.
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Thyroxine: a hormone secreted by the thyroid gland that is involved in the control of the metabolic rate.
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Total body fat: the sum total of the body’s storage fat and essential fat stores.
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Trace minerals: those minerals essential to human nutrition that have an RDA less than 100 mg.
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Trans fatty acids: unsaturated fatty acids in which the hydrogen ions are on opposite sides of the double bond.
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Trigger points: small hyperirritable areas within a muscle.
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Triglycerides: one of the many fats formed by the union of glycerol and fatty acids.
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Tryptophan: an essential amino acid.
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Type I muscle fiber: the slow-twitch red fiber that provides energy primarily by the oxygen system.
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Type IIa muscle fiber: the fast-twitch red fiber that provides energy by both the oxygen system and the lactic acid system.
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Type IIb muscle fiber: The fast-twitch white fiber that provides energy primarily by the lactic acid system.
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| Tyrosine: a nonessential amino acid.
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