Fat is a tissue within the body which tends to be predominantly burned during periods of rest as well as during low-intensity cardio (i.e., 65% HRR) . But just because more calories from fat are burned during low-intensity cardio does not mean this is the best way to burn bodyfat. In fact, it takes much longer to burn an equivalent amount of fat performing low-intensity cardio versus high-intensity cardio. In other words, you can burn more calories from fat in less time by performing high-intensity cardio (i.e., 85% HRR) because you burn more calories in general compared to low-intensity cardio. For example, if you perform 30 minutes of low-intensity cardio, you may burn up to 200 calories of which 100 calories came from fat. On the other hand, if you perform the same duration (30 minutes) at twice the intensity, you may burn up to 400 calories of which 160 calories came from fat. Thus, you will burn more fat when performing high-intensity cardio by virtue of burning more calories in general. In addition, high-intensity cardio tends to elevate the metabolic rate for a period after the exercise more so than low-intensity cardio. This means high-intensity cardio promotes an "afterburner" effect in which even more calories are burned from fat several hours post-exercise. If you perform twice the duration of low-intensity cardio in the example above (60 minutes), you will burn more fat calories than high-intensity cardio but the overall calories burned will be about the same compared to high-intensity cardio performed at half the duration (30 minutes). In other words, low-intensity cardio is not an efficient means of burning bodyfat compared to high-intensity cardio.
BOTTOM LINE: High-intensity cardio is the most efficient way to burn bodyfat. Interval training is another means to efficiently burn more fat calories as well.
Brian Danley, CFT
"Motivation is what gets you started. Habit is what keeps you going."
Brian Danley, CFT "Motivation is what gets you started. Habit is what keeps you going." 408-688-1586 (cell) briandanleyfitness.com https://www.linkedin.com/in/briandanleyfitness https://www.facebook.com/BrianDanleyFitness
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I'm a personal trainer who loves to help others fulfill their health and fitness goals. I consider myself a bodybuilder in that I live the lifestyle of eating healthy food, working out regularly, and sculpting my body.