IMPORTANT BIOFITNESS WORD DEFINITIONS
11 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.
CAPILLARIES The smallest blood vessels where oxygen, foods, and hormones enter the cells and carbon dioxide and wastes are removed.
ENDORPHINS A brain chemical that eases or suppresses pain.
FATIGUE A generalized or specific feeling of tiredness that may have a multitude of causes both mental and physical.
FLEXIBILITY That property of muscles and connective tissue which allows full range of motion.
MUSCLE TONE Muscle firmness in the absence of a voluntary contraction.
MYOFIBRIL One of many fibrils consisting mainly of protein that fill a muscle fiber.
PROGRESSIVE RESISTANCE A program in which the amount of resistance is regularly increased as the muscles gain in strength; maintaining continual overload.
STROKE VOLUME The amount of blood ejected by a ventricle of the heart with one beat.
WORKLOAD The total of resistance as measured by time and/or effort into days, weeks, or months.

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