If your goal during Yoga is to burn the highest percentage of calories from fat, make sure you stay in your calculated target heart rate range for fat burn or, in other words, your “fat burning zone.” When you exercise in your fat burning zone, you use a greater percentage of calories from fat than at other heart rate zones. You reach your typical fat burning zone when your heart rate is at 55 percent to 70 percent of your maximum heart rate.
Your target heart rate for fat burning is approximately 55 percent to 70 percent of your maximum heart rate. Multiply your MHR by 0.55 to get your lower level threshold, and multiply your MHR by 0.70 to get your upper level threshold. So, if you are 40 years old, your lower level threshold would be 180 x 0.55 = 99 beats per minute, and your upper level threshold would be 180 x 0.70 = 126 beats per minute. This would make your fat burning zone 99 to 126 beats per minute.
Another method is to take 180 and minus your age would be the top of your range. Then take 20 away from top of your range that would be bottom of your range.
180 – (your age) = Top Of Your Range
Top Of Your Range – 20 = Bottom Of Your Range
Once you have calculated your fat burning zone, be sure to adjust your intensity during exercise to stay within those upper and lower limits. Periodically check on your heart rate using one of the methods listed above. Your percentage of calories burned from fat will decrease if you go over this range.