
Wear these to your big box gym and keep them on at all times!
I really thought that we had put this issue to rest. But based on some questions I received at a presentation on Saturday, there are still some big box gyms selling an expensive vo2 max test/heart rate monitor package based on this very flawed concept.
The suggestion that we burn a greater percentage of our calories from fat during slow activity (50% of maximum heart rate) is true, but we need to look at the big picture. Example: train at a lower intensity for 30 minutes and burn 220 calories- 50% of those from fat. Conversely, train hard (intervals) for 30 minutes and burn 400 calories- 35% of those from fat. I'm no math whiz, but I can look at these simple numbers and tell you that, even though the percentages look advantageous for low intensity training, you are still burning more calories from fat with the interval training.
This simple example is still shortsighted when it comes to fat loss. We are no longer looking at how many calories that we burn during our chosen activity, but how does that activity affect our overall fat loss environment. A more important factor in fat burning is how many calories we burn AFTER our chosen activity. This is know as EPOC and while I won't bore you with to much technical jargon, it is THE determining factor in how value exercises for fat loss. In Robert dos Remedios's new book, Cardio Strength Training, Robert offers this:
Probably the most significant, if not the most startling, study completed comparing steady-state training to interval training for fat loss was done by Tremblay et al in 1994.
They took two groups, having one complete 20 weeks of endurance (steady-state) training and the other complete 15 weeks of interval style training. When all was said and done, the endurance group burned 28,661 calories via exercise while the interval group burned 13,614. That's right: The interval group burned less than half as many total calories. The researchers then adjusted for the difference in the energy cost of training and found that the interval group lost 900 percent more subcutaneous fat than the endurance group- nine times the amount fat.
Why? EPOC or the energy burned as a result of an interval style training session over the next 20-40 hours.
Beyond these examples, let's put on our filters and apply a little common sense. So you want to lose some stubborn fat? Does it make sense that you are training too hard and need to lower your intensity? Exactly.
It takes a 3500 calorie deficit to lose 1 lb of body fat. I don't know about you, but most folks would like to do that with the least possible investment of their valuable time. If you are one of these people, do yourself a favor and use interval style training to get the most bang for your buck out of your workouts.
Oh, and if your gym or trainer suggests training at a snails pace for fat loss, run. Slowly of course so that you burn tons of fat :)



