In case you’ve never heard of it, Tabata is a form of HIIT that requires 20 seconds of ultra high intensity exercise to be followed by 10 seconds of rest and repeated eight times. Tabata was created to condition the most elite of elite athletes. But in my estimation, the vast majority of non-elite individuals who think they’re following the Tabata protocol are not. In fact, they’re not even close. Why do I think this? Because I can virtually guarantee that nobody, including myself, has ever been able to get anywhere near 170% of their V02 max. That’s what Tabata really is. V02 max is basically a measure of the amount of oxygen your body can use per minute, normalized to body weight. So at 100% of your V02 max, your body is using all the oxygen it can possibly use. 170% of V02 max means that your body’s oxygen processing capacity is being outstripped by 70%. Any idea what that feels like? Searing pain. Absolute agony. Three years ago in my cardiovascular prime (I was in the top 1% of the population for my age), I could complete only two rounds of real Tabata before collapsing. It is extreme, severe, virtually impossible. This is why most recreational fitness enthusiasts partaking in Tabata aren’t really doing it. They might be getting up to 90% or [less likely] 100% of V02 max, but nowhere remotely near 170%, I promise.
All that said, even it its unadulterated form, Tabata is inefficient for fat loss and strength development. It can be more effective than steady state cardio because it does create a modest anabolic stimulus, but it doesn’t hold a candle to heavy lifting. Let’s first look at why Tabata isn’t nearly as efficient for fat loss as heavy lifting.
I’ve mentioned in several other posts that if you want to lose fat, like if you really want to lose fat and stop believing what you see on TV, heavy lifting is the only way to go. Fat loss is almost blindly attributed to burning more calories than you eat. Yeah, you might lose fat if you eat less than you burn, but that’s usually not the case. You will DEFINITELY lose WEIGHT if you eat less than you burn, but generally that weight is comprised of a lot of muscle. Your body is efficient; when it’s in a chronic caloric deficit, it will preferentially use muscle over fat for fuel if there is no reason for it to hold it. Since muscle is metabolically active and requires energy to maintain, your body wants none of it when faced with the choice. This results in skinny-fat syndrome i.e. when someone who does lots of cardio and eats at a deficit is slim, but flabby.
If you’re really serious about losing fat, your job is to not give your body the choice between using fat or muscle as fuel. Your job is to force it to burn fat to the greatest degree possible. How do you do that? Lift very heavy weights. This simple thing creates a powerful anabolic signal that tells your body that the muscle is critically needed for something, meaning that you must metabolize more fat and less muscle to meet energy demands. There’s far too much fat-loss misinformation that treats fat loss as something acute, i.e. that you must burn lots of energy exercising to lose fat. It’s just flat out wrong and counterproductive. Weight lifting doesn’t acutely burn many calories–maybe like 250 in an hour for the average sized male. What it DOES do is to create the conditions necessary for your body to prioritize fat metabolism when you are in a caloric deficit.
Tabata (the real version of Tabata) is meant to develop superior cardiovascular capacity. That’s it. It’s not a tool for fat loss and it’s not a tool for muscular development (well, maybe smooth cardiac muscle, but that’s not what we’re talking about here). It is one of several exercise modalities that professional athletes use to endure longer in their sports. The cardiovascular fatigue Tabata or even a more moderate HIIT routine creates competes with your ability to create the type of anabolic stimulus necessary to force your body into fat-burning mode.
Take-away: just stay away from HIIT, lift heavy, and reduce your calories if you want to lose fat.