<span>Gradually increasing the demands on your body as you advance in your fitness program is known as progression. You progress to other levels of training, so as to make your body stronger. Specificity is the quality of being specific. Regularity refers to something that happens regularly. Overload is too much burden, and it is not good.</span>
<span>More than 80 percent of adults do not meet the guidelines for both aerobic and muscle strengthening activities found in Healthy People 2020.</span>