How To “Shred Your Body And Get More Definition”

Use these science-backed methods to trim down.

Whether you’re looking to make a lifestyle change, lose 10 pounds, or achieve a six-pack by beach season, odds are you’ve googled “how to burn fat” for the best ways to reach your target weight. And chances are you’ve stumbled upon every method imaginable — from detox teas promoted by Instagram #fitluencers to every type of diet imaginable. The thing is, losing fat is a science with a lot of nuances. People have different bodies and different goals.

In this article, we’ll go over the science-backed methods behind fat-loss and give you the tools to craft your own fat-building routine. An important note: There is no one way to burn fat. Losing weight (while retaining muscle) is an all-day-every-day job. It requires you to eat healthier foods in calculated amounts, train hard in the gym, and sleep more than you’re maybe sleeping now. Here’s what you need to know about how to burn fat.

How to Shred Your Body:

How Fat Loss Works

Although there are many different fat burning methods, they all have one thing in common — they put you in a caloric deficit (defined as burning more calories than you consume). Multiple studies have concluded that fat loss is only achieved when you’re in a caloric deficit.

Don’t believe the hype that certain types of diets can achieve this quicker than others, either. When matched calorie-for-calorie, the popular Keto diet was no more effective for weight loss than other diets.

So how does one achieve a caloric deficit? First, you have to figure out how many calories you need to maintain your weight. To do that, you can use our handy calculator to find your ideal starting point. Remember that the number you get is exactly that, a starting point. You’ll need to adjust as needed.

Macronutrient Calculator

Once you have that number, you’ll want to subtract 150-300 calories per day. Though, the calculator above does that work for you if you selected fat loss as your goal. This slight caloric deficit ensures slow and steady fat loss without losing too much, too quickly. That’s the first important lesson to take away from this article.

People sometimes become obsessed with losing weight as quickly as possible. Just like the old tale with the tortoise and the hare, slow and steady is what will win you the race.

A 2017 double-blind study found that slow, progressive weight loss was better from a body composition standpoint. Another from the Journal of the International Society of Sports Nutrition states that losing half to one percent of body weight per week was the best way to drop fat while retaining lean muscle mass (which, as we’ll discuss later, is another way to burn fat).

Another study followed contestants on The Biggest Loser — a show that touted intense exercise and very low 1,200-calorie diets — and found, on average, they regained 70 percent of the weight they lost on the show.

The key is to find sustainable lifestyle habits that you can stick with to lose weight and keep it off. To that end, here are some strategies to achieve that.

Start Weight Lifting to Increase Muscle Mass

Those Hollywood montages showing out-of-shape people working out and becoming ripped may be somewhat unrealistic, but they’re not totally wrong. Increasing muscle mass is one of the easiest ways to burn fat and lose weight. (It just doesn’t happen that quickly.)

This isn’t accomplished in the way most people think. In fact, a 185-pound person will only burn 266 calories during a 30-minute vigorous weight lifting session, according to Harvard Medical School. The same person would burn 355 calories in 30 minutes running at five miles-per-hour.

So why bother with weight lifting at all then? In short, increasing muscle mass revs up your metabolism, which leads to quicker weight loss. For each pound of muscle gained, you’ll burn anywhere from six to 10 calories. So if you gain 10 pounds of muscle, you’d burn an additional 100 calories per day. That adds up fast.

Strength training has also been shown to reduce visceral fat, the excess fat that gathers around your abdomen (this type of fat may also increase your risk of several diseases). Strength training also helps preserve lean muscle mass, even when you’re in a caloric deficit.

Switch Up Your Macronutrient Split

After you’ve decided how many calories you need to eat to lose weight, you’ll also need to decide how to split those calories into the three macronutrients — protein, carbohydrates, and fats.

It’s important to note that not all calories are created equal. Calories from protein will react differently than calories from carbs and fats, and all are necessary for certain bodily functions such as preserving lean muscle mass and controlling blood sugar levels.

Switching up where you get your calories from might accelerate your fat loss, either by increasing your protein intake or limiting the amount of fat you eat.

We’ll go over what to look for in each macronutrient here, and at the end, give you a guide on how you should split them.

Eat More Protein

Protein is often discussed in people’s muscle-building journey, but it plays an equally vital role in losing weight. That’s because Protein has been shown to increase satiety, or the feeling of being full, more than carbs or fats. Naturally, this leads to people eating less food and fewer calories, making a caloric deficit more achievable.

Protein — either from whole foods or a whey protein shake — also helps increase thermogenesis in the body, which means it takes more calories to digest protein than any other macronutrient. So you’re burning more calories without having to actively do anything.

Lastly, protein helps the body hang onto your hard-earned muscles, which, as we just discussed, burns calories faster than fat.

Avoid Simple Carbohydrates

Carbs often receive a bad rap in the fitness world, but ultimately the problem is that people eat the wrong type of carbs. There are two main types: simple and complex carbs.

Simple carbs make up the majority of the Western diet — these are things like sugar, white bread, corn syrup, fruit juice concentrate, sodas, pastries, most snack foods, and breakfast cereals.

On the other hand, complex carbohydrates include things like fruits, vegetables, whole grains, and beans. What’s the difference?

Simple carbs are digested by the body more quickly than complex carbohydrates. The more quickly you use that energy, the sooner you’ll need more energy — which means you’ll need to eat more food sooner after you eat. Complex carbs provide more sustained energy, meaning you’ll be more energized for longer and need to eat less. Complex carbs also help control blood sugar levels, preventing hunger pangs and preventing conditions such as type 2 diabetes.

This isn’t just important for your weight loss journey but your long-term health as well. A 2020 study found that low-carb and low-fat diets didn’t increase people’s life span — the choice to eat healthy carbs and healthy fats did, though.

Limit Your Fat Intake

Fat, just like carbs, are demonized because most of Western society eats the wrong kind. Typically, you want to stay clear of saturated fats, which can raise your “bad” cholesterol and put you at risk of heart disease. The “good” fats, aka unsaturated fats, are necessary for certain bodily functions, including the absorption of vitamins A, D, E, and K. It’s also necessary to help the body utilize certain hormones, including testosterone.

Fats are also calorically denser than carbs and protein. Fat contains nine calories per gram, compared to four calories from protein and carbs. This means it takes far less fatty food — like avocados, peanut butter, olive oil, and almonds — to rack up more calories. Also, those same fatty foods typically aren’t as filling. You’re more likely to feel full after eating 200 calories worth of chicken breast — or half a pound worth — than 200 calories of peanut butter, which equates to 3 tablespoons.

What’s the Best Macronutrient Split?

Your macronutrient split will ultimately come down to your personal preference. If you’re not a fan of bread in the first place, then maybe the Keto diet is right for you. Research different diets to see what foods are allowed or prohibited and pick the one you can best stick to. Again, the diet itself isn’t as important as maintaining a caloric deficit.

The Food and Nutrition Board of the Institutes of Medicines recommends that 45-65 percent of your calories come from carbs, 10-35 percent from protein, and 20-35 percent from fat.

To ensure you’re getting the right macros, invest in a food scale to ensure you’re not eating too much of one food and an app such as MyFitnessPal. The scale will ensure you’re eating just enough food and not go over your daily allowance, which you’ll track in the fitness app of your choice.

You’ll also want to buy a bodyweight scale. You need to know which way your weight is trending. (You can also take full-body pictures and measure your waist and muscles as another way to track progress.) Which way your weight is trending — and how quickly — will help you decide how many calories to either add or subtract weekly.

Cut the Sugar out of Your Diet

As we discussed above, certain types of carbs can raise your blood sugar and make you hungrier — and therefore eat more food — than others. According to one study, the U.S. population eats 300% of the recommended daily amount of added sugar (which, according to the American Heart Association, is six teaspoons for women and nine for men).

To illustrate how fattening added sugars can be, we’ll use Gatorade as an example. A 20-ounce bottle of Gatorade packs more than 30 grams of added sugar and up to 150 calories. On the other hand, Gatorade Zero has no added sugar and only up to 10 calories for the entire container. See the difference?

Luckily, many brands are beginning to realize that people are trying to cut down on sugar and everything from barbecue sauces to jams now has zero sugar added options.

HIIT Fat Where it Hurts

Aerobic exercises — such as walking, running, swimming, or hiking — burn more calories during a 30-minute session than weight lifting, but the long-term effects are not as rewarding. High-intensity interval training, better known by its acronym HIIT, is a different story.

One study noted that regular HIIT sessions result in increased fat burning and reduce abdominal fat levels. (It’s also a great way to improve your conditioning.) Research from the University of Mexico also found women lost fat in half the amount of time than women who did continuous exercise.

Try Intermittent Fasting

Intermittent fasting is one of the diet strategies that’s received mainstream attention, and for good reason. Multiple studies have shown that it’s an effective way to cut body fat and reduce your caloric intake. One study also found it to be effective in decreasing fat and maintaining muscle mass.

If you’re unfamiliar with intermittent fasting, it basically involves limiting your eating window to a set period of time. There are various ways to achieve this, but one of the most popular ones is 8:16 — which is when you eat all your calories in an eight-hour window and fast for 16. While you’re fasting, you’re limited to water, black coffee, herbal teas, and any beverages that have zero calories.

The basic idea is that if you have a shorter time to eat all your calories, you’ll eat fewer of them than if you were grazing throughout the entire day.

Hit the Sack at Night

When our bodies don’t get enough sleep, it’s hard to do just about anything —think back to your college days and how difficult it was to get to class after an all-nighter. Weight loss is one thing that slows down when you get less sleep.

One study found that people were more likely to gain weight if they didn’t get at least seven hours of sleep a night, and another found people were 33 percent more likely to lose weight if they had a sound night’s sleep.

Sleep deprivation is also linked to increased hormone ghrelin levels, also known as the “hunger hormone,” because it increases hunger levels in the body. Your sleep habits also have a huge impact on your in-gym performance. One study published in the journal Sleep found that 11 Stanford University basketball players who logged 10 or more hours of sleep for five to seven weeks improved their shooting accuracy and three-point percentage by nine percent. Anecdotally, the subjects said they felt better physically and mentally during practices and games.

The Final Word

Any way you spin it, fat loss takes work. You need to count your macronutrients, follow a smart workout split, limit your sugar intake, and ensure you’re getting enough sleep. It’s a 24/7 job that doesn’t end once you leave the gym. To recap, here’s a basic blueprint of steps you can follow to ensure you’re on the right track to burning fat.

Educate Yourself on Fat Loss: Reading this article is a great start.
Learn About the Three Main Macronutrients: These are protein, carbs, and fat.
Try Cutting Down Sugar: It’s extra calories that only leave you feeling just as hungry as before you ate.
Lift Weights: Lifting weights will build muscle, and more muscle equals more overall calorie burn.
Try HIIT Workouts: Interval training will raise your heart rate and ramp up the calorie burn.
Consider Fasting: Fasting itself isn’t magical, but condensing your eating window allows you to eat larger meals while still staying in a caloric deficit.
Prioritize Sleep: There’s enough science to show that more sleep is better for your weight loss efforts and your in-gym performance,

More Fat Burning Tips

Learn everything you need to know about how to burn fat. Check out these other IFBNewsfeed.Org articles to optimize weight loss.

References

Strasser B, Spreitzer A, Haber P. Fat loss depends on energy deficit only, independently of the method for weight loss. Ann Nutr Metab. 2007;51(5):428-32. doi: 10.1159/000111162. Epub 2007 Nov 20. PMID: 18025815.
Hall KD. What is the required energy deficit per unit weight loss?. Int J Obes (Lond). 2008;32(3):573-576. doi:10.1038/sj.ijo.0803720
Johnston CS, Tjonn SL, Swan PD, White A, Hutchins H, Sears B. Ketogenic low-carbohydrate diets have no metabolic advantage over nonketogenic low-carbohydrate diets. Am J Clin Nutr. 2006 May;83(5):1055-61. doi: 10.1093/ajcn/83.5.1055. PMID: 16685046.
Ashtary-Larky D, Ghanavati M, Lamuchi-Deli N, et al. Rapid Weight Loss vs. Slow Weight Loss: Which is More Effective on Body Composition and Metabolic Risk Factors?. Int J Endocrinol Metab. 2017;15(3):e13249. Published 2017 May 17. doi:10.5812/ijem.13249
Helms ER, Aragon AA, Fitschen PJ. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. J Int Soc Sports Nutr. 2014 May 12;11:20. doi: 10.1186/1550-2783-11-20. PMID: 24864135; PMCID: PMC4033492.
Fothergill, E., Guo, J., Howard, L., Kerns, J. C., Knuth, N. D., Brychta, R., Chen, K. Y., Skarulis, M. C., Walter, M., Walter, P. J., & Hall, K. D. (2016). Persistent metabolic adaptation 6 years after “The Biggest Loser” competition. Obesity, 24(8), 1612–1619. https://doi.org/10.1002/oby.21538
Wang Z, Ying Z, Bosy-Westphal A, et al. Evaluation of specific metabolic rates of major organs and tissues: comparison between men and women. Am J Hum Biol. 2011;23(3):333-338. doi:10.1002/ajhb.21137
Dutheil F, Lac G, Lesourd B, Chapier R, Walther G, Vinet A, Sapin V, Verney J, Ouchchane L, Duclos M, Obert P, Courteix D. Different modalities of exercise to reduce visceral fat mass and cardiovascular risk in metabolic syndrome: the RESOLVE randomized trial. Int J Cardiol. 2013 Oct 9;168(4):3634-42. doi: 10.1016/j.ijcard.2013.05.012. Epub 2013 May 25. PMID: 23714599.
Hunter GR, Byrne NM, Sirikul B, Fernández JR, Zuckerman PA, Darnell BE, Gower BA. Resistance training conserves fat-free mass and resting energy expenditure following weight loss. Obesity (Silver Spring). 2008 May;16(5):1045-51. doi: 10.1038/oby.2008.38. Epub 2008 Mar 6. PMID: 18356845.
Douglas Paddon-Jones, Eric Westman, Richard D Mattes, Robert R Wolfe, Arne Astrup, Margriet Westerterp-Plantenga, Protein, weight management, and satiety, The American Journal of Clinical Nutrition, Volume 87, Issue 5, May 2008, Pages 1558S–1561S, https://doi.org/10.1093/ajcn/87.5.1558S
Shan Z, Guo Y, Hu FB, Liu L, Qi Q. Association of Low-Carbohydrate and Low-Fat Diets With Mortality Among US Adults. JAMA Intern Med. 2020;180(4):513–523. doi:10.1001/jamainternmed.2019.6980
Manore MM. Exercise and the Institute of Medicine recommendations for nutrition. Curr Sports Med Rep. 2005 Aug;4(4):193-8. doi: 10.1097/01.csmr.0000306206.72186.00. PMID: 16004827.
Faruque S, Tong J, Lacmanovic V, Agbonghae C, Minaya DM, Czaja K. The Dose Makes the Poison: Sugar and Obesity in the United States – a Review. Pol J Food Nutr Sci. 2019;69(3):219-233. doi:10.31883/pjfns/110735
Boutcher SH. High-intensity intermittent exercise and fat loss. J Obes. 2011;2011:868305. doi:10.1155/2011/868305
Zhang, H., Tong, T. K., Qui, W. et al. (2017). Comparable effects of high-intensity interval training and prolonged continuous exercise training on abdominal visceral fat reduction in obese women, Journal of Diabetes Research, 9 pages, doi.org/10.1155/2017/5071740
Tinsley GM, La Bounty PM. Effects of intermittent fasting on body composition and clinical health markers in humans. Nutr Rev. 2015 Oct;73(10):661-74. doi: 10.1093/nutrit/nuv041. Epub 2015 Sep 15. PMID: 26374764.
Moro T, Tinsley G, Bianco A, Marcolin G, Pacelli QF, Battaglia G, Palma A, Gentil P, Neri M, Paoli A. Effects of eight weeks of time-restricted feeding (16/8) on basal metabolism, maximal strength, body composition, inflammation, and cardiovascular risk factors in resistance-trained males. J Transl Med. 2016 Oct 13;14(1):290. doi: 10.1186/s12967-016-1044-0. PMID: 27737674; PMCID: PMC5064803.
Patel SR, Malhotra A, White DP, Gottlieb DJ, Hu FB. Association between reduced sleep and weight gain in women. Am J Epidemiol. 2006 Nov 15;164(10):947-54. doi: 10.1093/aje/kwj280. Epub 2006 Aug 16. PMID: 16914506; PMCID: PMC3496783.
Thomson CA, Morrow KL, Flatt SW, Wertheim BC, Perfect MM, Ravia JJ, Sherwood NE, Karanja N, Rock CL. Relationship between sleep quality and quantity and weight loss in women participating in a weight-loss intervention trial. Obesity (Silver Spring). 2012 Jul;20(7):1419-25. doi: 10.1038/oby.2012.62. Epub 2012 Mar 8. PMID: 22402738; PMCID: PMC4861065.
Beccuti G, Pannain S. Sleep and obesity. Curr Opin Clin Nutr Metab Care. 2011;14(4):402-412. doi:10.1097/MCO.0b013e3283479109
Mah CD, Mah KE, Kezirian EJ, Dement WC. The effects of sleep extension on the athletic performance of collegiate basketball players. Sleep. 2011;34(7):943-950. Published 2011 Jul 1. doi:10.5665/SLEEP.1132