![Army soldiers running Army soldiers running](https://webarchive.library.unt.edu/web/20121020021138im_/http://offload.goarmy.com/soldier-life/fitness-and-nutrition/components-of-fitness/cardio/jcr:content/contentpar/header.pt-running-1.png)
CARDIO
Reaching Your Target Heart Rate
CR is the efficiency with which the body delivers oxygen and nutrients needed for muscular activity and eliminates waste products from the cells. In order to improve fitness it is important to reach your bodies Target Heart Rate, or training heart rate. The THR is a desired range of heart rate reached during aerobic exercise, which enables your heart and lungs to receive the most benefit from a workout. In turn, this will improve your endurance. Experts recommend that you monitor your heart rate during your exercise routine—the goal is to stay in the zone of 50 to 85 percent of your THR.
Download Fitness Log:
Here is a calculator to monitor your progress in reaching Basic Combat Training preparation.