IMPORTANT BIOFITNESS WORD DEFINITIONS
12 WORDS THIS PAGE DEFINITION
AEROBIC Energy created with oxygen, or in the presence of oxygen.
ANAEROBIC Energy created without oxygen, or in the absence of oxygen.
ENDURANCE-STRENGTH The ability of a muscle to produce prolonged effort.
FAST-SLOW-TWITCH FIBER A striped type of muscle fiber that exhibits both slow fatigue and quick fatigue characteristics depending on the demands placed upon it.
FAST-TWITCH FIBER One of the two major types of muscle fiber that contracts and fatigues quickly and relies mainly on anaerobic energy.
FATIGUE A generalized or specific feeling of tiredness that may have a multitude of causes both mental and physical.
HYPERTROPHY An increase in the overall size of a tissue.
POWER-STRENGTH The amount of work accomplished by a muscle relative to the duration of the effort (work divided by time).
SKELETAL MUSCLE The most prevalent type of muscle in the body; usually anchored to bone to carry out voluntary movement.
SLOW-TWITCH FIBER One of the two major types of skeletal muscle fiber; it contracts and fatigues slowly and relies mainly on aerobic energy.
STROKE VOLUME The amount of blood ejected by a ventricle of the heart with one beat.
TESTOSTERONE Male growth hormone responsible for muscle growth and masculine characteristics (facial hair, deep voice, aggressiveness, ect.).

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