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. |