| A | B |
|---|
| physical activity | any movement that requires your large muscle groups to work |
| endorphins | chemicals that block pain messages from reading your brain cells |
| physical fitness | you have the energy and strength to participate in a variety of activities |
| body composition | the amount of fat tissue in your body compared to the amount of lean tissue, such as muscles and bones |
| aerobic exercise | ongoing physical activity that raises your breathing rate and heart rate |
| anaerobic exercise | intense physical activity that lasts for a few seconds to a few minutes |
| isometric exercise | an exercise in which muscles contract by very little body movement takes place |
| isotonic exercise | involves contracting and relaxing your muscles through the full range of a joint's motion |
| isokinetic | involves muscles contracting at a constant rate |
| lifelong fitness | the ability to stay healthy and fit as you age |
| FITT formula | frequency, intensity, time, type |
| target heart rate | the rate at which your cardiovascular system receives the most benefits from exercise without working too hard |
| cross-training | participating in a wide variety of activities |
| dehydration | excessive water loss |
| dietary supplement | any product that contains one or more vitamins, minerals, herbs, or other dietary substances that may be lacking in the diet |
| overtraining | exercising too intensely or for too long without allowing enough time for rest |
