The afterburn effect has a fancy name called EPOC, which stands for "excess post-exercise oxygen consumption. This is when your body takes in a high amount of oxygen to bring your body back to its resting state and has an increased metabolism. During EPOC, your body continues to expend calories to remove lactic acid in your muscles, repair damaged tissues and deliver nutrients from food to the cells in your body. Depending on the workout intensity, gender and fitness level, EPOC can last anywhere from 15 minutes to 48 hours.
A WORD OF CAUTION
If you have any cardiovascular or metabolic problems or have pain, check with your doctor before starting any workout routine. Vigorous may not be appropriate for those with high blood pressure, because the arteries stiffen and don't expand to increase blood flow. Stick with low- to moderate-intensity exercises, like jogging and cycling, until your condition improves or recommended by a physician. If you're new to exercise and want to try plyometrics or weightlifting, work with a qualified fitness coach before attempting to do this on your own.