| A | B |
|---|
| Physical Fitness | Having the energy and strength to participate in a variety of activities |
| Muscular Strength | The ability to exert maximum force, such as lifting the heaviest weight you can budge, at one time |
| Target Heart Rate | The rate at which your cardiovascular system receives the most benefits from exercise without working too hard |
| Flexibility | The ability to move a joint through its full range of motion; the elasticity of a muscle |
| Anaerobic Exercise | Intense physical activity that lasts a few seconds to a few minutes |
| Endorphins | Chemicals that block pain messages from reaching brain cells and produce feelings of pleasure |
| Isometric Exercise | An exercise in which a muscle contracts, but very little body movement takes place |
| Muscular Endurance | The ability to hold a particular position for a sustained period of time or repeat a movement many times |
| Maximum Heart Rate | The upper limit of what your cardiovascular system can handle during physical activity |
| Aerobic Exercise | Ongoing physical activity that raises your breathing and heart rate |
| Physical Activity | Any movement that raises your breathing and heart rate |
| Isotonic Exercise | An exercise that involves contracting and relaxing your muscles through the full range of a joint's motion |
| Frequency | How often you exercise |
| Intensity | How hard you exercise |
| Time | How long you exercise |
| Type | The activities you do for exercise |
