I'm a Fitness Expert: Here's What Really Burns More Fat After 40, Walking or HIIT

Are you confused about HIIT (high-intensity interval training) workouts and if they are right for you? Thomas DeLauer (@ThomasDeLauerOfficial) is a YouTuber with over 3.68 million subscribers who share content about how to improve your life and who lost over 110 pounds by maintaining a healthy diet and walking. In a new viral video, he tackles the popular workout method, revealing who it is best for and the various ways you could be doing it wrong. “High-intensity interval training is a whole different ball game than what most people think that it is. I want to give you a breakdown of A, what high-intensity interval training really is, and B, what kind of cardio you should be doing when you're intermittent fasting, or what you need to know to at least make an informed decision,” he says.

HIIT Isn’t Always the Most Effective Workout for Fat Loss and Metabolic Response

“The first thing I want to talk about before I even get into anything that has to do with fasting is truly give you the breakdown of what high-intensity interval training should truly look like and what you're actually trying to accomplish,” he says in the post. “Most people look at high-intensity interval training as just this way to get a crazy lung burner, just an awesome workout where you feel like you just torched a bunch of calories. That's all fine and dandy, but it doesn't always elicit the best metabolic response, and it doesn't always elicit the best body composition response. You don't always get the desired outcome. You may feel like you accomplished something, but that's not because high-intensity interval training is bad. It's because most people are doing it wrong.”

HIIT Cardio Is Similar to Weight Training

“When we're doing high-intensity interval training, we are activating the anaerobic system of the body. So I want you to think of high-intensity interval training cardio the same way that you would think of weight training,” he says. “Weight training operates with the same metabolic business in your body that high-intensity interval training does. It's utilizing carbohydrates as a source of fuel. So what that means is you're in that rep range of maybe six reps all the way up to 15 reps in the weight room. Well, it's the same kind of thing that you're burning when you're doing a high intensity interval training workout,” he says.

Most People Are Doing HIIT the Wrong Way

He offers an example of what most people think HIIT looks like. “Most people will go ahead and do one minute of high-intensity exercise and then one minute off. Then they'll go back, and they'll do one minute on and one minute off. This is great for gamifying a process. I understand that it makes it easy, but that's not how the body works. The body doesn't necessarily know what one minute or two minutes are. The body just knows when it's fully fatigued or not,” he says.

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This Is the Right Way

“The whole idea with high-intensity interval training is you need to 100% be pushing it to the max and then recovering for however long it takes, whether it's 30 seconds, one minute, two minutes, to be able to be fully recovered to give it 100% again. So it varies from person to person on how long the rest periods should be. It is absolutely not uniform,” he continues. “You should be doing your high-intensity training all the way pedal to the metal for like 15, 20 seconds because, quite honestly, that's about how much energy you have stored up in your body to really perform at 90 to a hundred percent. If you're going longer than 20 or 25 seconds, then you're not pushing it at 90 or a hundred percent. Plain and simple, period. You should be going all the way then recovering as much as you possibly need to to be able to afford to push it 100%.”

If You Are Doing It the Other Way, You Aren’t Going to Your Max

“If you're going at one minute on, one minute off, you're probably going something like 50, 60% of your maximum and then just recovering for however long it takes, that doesn't really add up. We need to elicit the metabolic response that we get when we would normally weight train where we're going all the way to failure,” he says.

HIIT Won’t Get You Into a Fasted State Easier

He then goes on to explain how it applies to fasting. “When you are in a fasted state, your body is not utilizing carbohydrates as a source of fuel. When you are fasted, your body is using ketones. It uses fat, and it turns fat into ketones. When you are doing high-intensity interval training, you're utilizing carbs. Now, I hear a lot of people talking about how high-intensity interval training is going to help them get into a fasted state easier, but that is not really the case,” he says.

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It Has More to Do with When You Are Eating

“Once you're already fasting, your body just stores the glycogen and puts it away. It's not like you have to burn through all your glycogen first before you start burning fat. It's really just how long you are going without eating before your body starts using fat. So it's not like you have to drain your tank and then start using fats. It doesn't quite work all the way like that, although it does in some cases. But high-intensity interval training isn't gonna get you to the benefits of fasting any faster. If you like to do high-intensity interval training, it should simply be because it feels good and because you want to get the maximum heart rate benefits,” he says.

If You Are Fasting and Want to Burn Fat, Try Steady State Cardio

“I like HIIT because it feels good. I get a good mental response from it. But if you're fasting and you're just looking to burn some fat, you're probably better off doing a little bit more of a steady-state type of cardio. I'm talking like literally just 15, 20 minutes at like 60 to 70% of your maximum heart rate. That's gonna oxidize fat a lot easier and maximize the utilization of the ketone bodies,” he says.

The Best Time for HIIT Is After a High Carb Meal

“But if you are gonna do HIIT, then you're gonna wanna make sure you do it right. And the thing is, HIIT is really good right after you have some kind of high-carbohydrate meal; that way, your body can actually use those carbs and put them to good use so they don't get stored at all. But it's very important that you're doing the high-intensity interval training properly,” he says. “Now, when it comes down to the time of your cardio later in the day, if you are someone that cannot do cardio in a fasted state, you have to do it after you've eaten well. You're someone who might respond well to doing high-intensity interval training as a form of cardio, but after you ate. So that would make sense only if you are doing your cardio at the end of the day, after you've already broken your fast.”

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Bottom Line? Mix It Up

The bottom line? “If you're doing your cardio in the morning while you are still fasting, you have to make an honest, informed decision with yourself about what you are after. Are you trying to burn more fat or are you trying to get more of a mental benefit? So maybe mix it up a little bit,” says DeLauer. And if you enjoyed this article, take advantage of these 31 Fitness Tips Every Beginner Needs to Look Sexy, According to Coaches.

You might have heard that walking is the best workout for weight loss. However, you might have heard the opposite. One expert is explaining everything you need to know about walking for weight loss – and if it is actually effective. Michaela, AKA Dr. Miche, PhD, is a research scientist who shares studies on weight loss, nutrition, health & fitness “to help you reach your goals!” she explains in her YouTube bio. In a new viral video, she addresses the question: Should you walk for weight loss? “Can losing weight really be as easy as just adding a few walks a week to your routine? The information out there is all over the place. As usual, I'm going to the actual scientific studies to find the answer. I'm also gonna tell you about how you can optimize the amount of fat burning you do from walking, and I bet you'll be surprised by the answer,” she says.

Some Say Walking Is Great for Weight Loss, While Others Say the Opposite

“The question of whether walking is useful for weight loss is more controversial than one might expect because if you do a Google search, you'll get information strongly on both sides of the spectrum,” she says in her post. “For example, you'll have blogs and news articles that say that walking is not useful for weight loss. You can also find a bunch of popular sites like magazines and whatnot, saying that walking is extremely useful for weight loss.”

She Discusses Three Studies

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She says she goes “straight to the science” to find out the answer, including a meta-analysis on whether walking is good for weight loss, “whether just adding walking to your routine and changing nothing else causes weight loss,” she says. “I'll also be going over a study that compares walking to running and biking for the same amount of time to see how fat burning varies between those three. And then lastly, I will be going over a study on how you can burn the most fat for a given amount of walking.”

When Losing Weight, You Actually Want to Reduce Body Fat Percentage

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“When most people say they want to lose weight, what they really mean is that they want to lose fat and lower their body fat percentage because the aesthetic benefits and the health benefits of weight loss pretty much all come from lowering your body fat percentage,” she points out. “A lot of people end up looking a lot better and getting a lot healthier while staying at the same weight because they lose fat and gain muscle. So a lot of the results I'll be talking about today are about body fat percentage in addition to weight, but the ones we should really care about are body fat percentage.”

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The First Study Instructed People to Walk More

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The first study, a meta-analysis that included over 1100 participants and examined various walking interventions for weight loss and cardiovascular health, “looked at randomized controlled trials where the only thing the researchers did was tell participants to walk more,” she says. “Their diets weren't changed, their other aspects of exercise weren't changed, they just had more walking added to their usual daily lives.” It found that, on average, these studies had people walk four times a week for 40 minutes per session for 35 weeks with no dietary interventions, and “they found that on average people lost two pounds or one percentage point of body fat, which is kind of a lot for just adding walking to your routine.”

The People Who Walked More Lost More Weight

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The people who didn’t add walking gained weight. “Not only did adding walking to people's routines prevent the weight gain that most people have happened to them over time as they age, but adding walking also caused weight loss on top of that prevention of weight gain,” she says, pointing out that it added up to a “net weight loss of like five pounds compared to the people who didn't add any walking to their routine.”

It Also Lowered Blood Pressure

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“The meta-analysis also found that just adding 40 minutes of walking four times a week lowered blood pressure by one to 1.5 points for both systolic and diastolic blood pressure and also raised VO two max by three, which is a measure of cardiovascular fitness. So people increase their fitness and lower their blood pressure substantially thanks to just adding a little bit of walking to the routine.”

The Next Study Compared Walking to Running and Biking

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She moves on to the study comparing walking to running and biking. “They matched all of these exercises in terms of how long participants spent doing them, how often they did them, and even their heart rate was approximately matched between each of these exercises. Participants were randomly assigned to do running, walking, or biking, and for every group, participants did these exercises 30 minutes per session three times a week for 20 weeks,” she says.

Here Is What Participants Had to Do

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“The walking group walked approximately 3.75 miles per hour, which is a pretty brisk walk, and the running group ran between six and seven miles per hour, and that varied by person depending on their age and how hard that was for them because they tried to match the intensity between these different exercises within a given person.” The biking group biked at approximately 60 to 70 RPM.”

The Walkers and Runners Lost the Most Pounds

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The results? “The running group lost three pounds over these 20 weeks, just running three times a week for 30 minutes. The biking group lost two and a half pounds doing these same number of sessions, while the walking group lost three pounds. So the walking group lost just as much as the running group and lost more than the biking group.”

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But the Walkers Lost More Than Double the Body Fat

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As for “the more important numbers, which is body fat percentage,” the running group lost about 1.2 points, the biking group also lost about 1.2 points, whereas the walking group lost three body fat percentage points. So more than twice as much as the running and biking groups, despite doing the same number of sessions of exercise for the same amount of time,” she says. “This may sound crazy, but it actually makes sense based on what we know about fat burning at different intensity levels.”

The Third Study Looked at Fat Oxidation Levels

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She moves on to the third study, where researchers “looked at how to reach peak fat oxidation levels during exercise.” She explains that “you want to be at peak fat oxidation levels if you are trying to lose fat because it means you are at your best fat-burning point in terms of intensity.” Researchers looked at grams, not percentages. “If you're sitting around doing nothing, you're actually gonna be burning a very high percent of fat. It just won't be very much,” she says. “Whereas you wanna get to a point where you're doing enough exercise at enough intensity to burn the maximum amount of fat before it starts to decline from burning too many carbs.”

Here’s How to Calculate Your Optimal Oxidation

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“There's like a sweet spot where you're burning more from doing stuff but not doing so much stuff that you stop burning fat,” she continues. “The study found that the maximum level of fat oxidation happens at about 60% of your maximum heart rate, and that is very easy to calculate. The crude estimate that is generally given is 220 minus your age, which equals your maximum heart rate. So if you're looking to maximize how much fat you burn from walking, then you should aim to walk at an intensity that causes you to be at about 60% of your maximum heart rate.”

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Or, Use These Averages for Men and Women

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If you don't feel like calculating that and figuring it out, the study found that for men, the average best rate of walking was 3.4 miles per hour, whereas, for women, it was about three miles per hour to maximize fat burning.

Bottom Line: Walking Is Great for Weight Loss

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“The next time you hear someone talking about how walking is useless for weight loss or how it's far inferior to running or biking or whatever else, you know how some science you can show them if you want to refute them and defend the wonders of walking,” she says. “I hope this can encourage you to consider adding walking to your routine not only for weight loss but also because it's just amazing for your health, and it's nice to get outside.” And if you enjoyed this article, take advantage of these 15 Quick Ways to Lose Body Fat Percentage in a Week.