There was a recent discussion on the Dragondoor.com forum about “cardio” and in a subsequent response on his blog Brett Jones , MRKC had the audacity to say the following:
“…the message coming from the general fitness industry which separates cardio and strength work and perpetuates the myth of fat burning zones etc… (yes I said the fat burning zone is a myth). “
This guy knows strength, but he is soooo off base about cardio, right??
Everybody knows that kind of exercise is best for losing bodyfat is “aerobics for 30-45 minutes 4-6 times per week at 60-70% of your Maximum Heart Rate (MHR).” ( MHR is calculated by subtracting your age from the number 220. )
Wrong, wrong, wrong. And I am gonna tell you why.
That kind of exercise is supposed to get you into something called the “fat-burn zone”, where a greater percentage of the calories burned come from fat. The concept is that since the human body burns a greater percentage of fat during low intensity exercise than it does at higher intensities, then that is the optimal way to burn fat overall.
See, the problem is the “as a percentage” bit. At higher intensities the body may only burn 35% of calories from fat while at lower intensities it may burn 50% or more of the calories from fat.
However, look at the bigger picture: at higher intensities you burn way more total calories, and more fat calories overall than you do at lower intensities. Would you rather have 50% of $100 dollars or 35% of $300?
So, while it is true that the body burns a greater percentage of fat at lower intensities than at higher intensities, that doesn’t account for the total calories burned, which is far more important.
Wanna get into the REAL fat-burn zone? Swing, snatch, press and TGU for a lot of reps. Cut all sugar and flour from your diet. Watch lard sizzle away…..