“Poor sleep quality or quantity can make it difficult to lose or even maintain your weight,” says Darria Long Gillespie, MD, a clinical assistant professor of emergency medicine at The University of Tennessee. When you are sleep deprived, your body becomes less sensitive to the effects of leptin, the hormone that usually signals that you’ve had enough to eat. At the same time, the amount of the hunger hormone, ghrelin, increases, so you want to eat more. Together, it’s a recipe for overeating.
“Speed is key—move, walk, or run a little faster and you’ll burn more total calories,” says Kravitz. In fact, changing up your walking pace quickly and frequently can help you melt up to 20% more calories, compared with maintaining a constant speed, according to a 2015 study from The Ohio State University. Try speeding up for 30 seconds, then walking at a comfy pace for three minutes.
Yes, athletes are constantly optimizing their training plans and race-day strategies, but you don’t need to go crazy if you’re just starting out. “When it comes to weight loss, moving and burning calories are what matters,” O’Connor says. “If you like sprints, which have a higher rate of calories burned per minute, then have at it; but if you prefer walking or slower jogging, you’ll just need to spend more time to burn those calories.”

Physical activity helps burn abdominal fat. “One of the biggest benefits of exercise is that you get a lot of bang for your buck on body composition,” Stewart says. Exercise seems to work off belly fat in particular because it reduces circulating levels of insulin—which would otherwise signal the body to hang on to fat—and causes the liver to use up fatty acids, especially those nearby visceral fat deposits, he says.
Toning your abs when trying to lose belly fat is crucial as well. To make a traditional plank routine more challenging, add in side planks. Roll onto your left forearm and stack your right foot on top of your left. Hold this position for 60 seconds, then switch sides. Having only two points of contact rather than four works your core harder and challenges your obliques as well.

I built this protocol for people who simply won’t take my advice to be patient and eat the Bulletproof Diet while using Bulletproof Intermittent Fasting. It uses biohacking techniques I pioneered on myself to reduce – but not eliminate – the risks of rapid fat loss. It prevents the metabolic harm and brain fog that come with very low-calorie diets (or multiple day fasts), and it does everything I can think of to maintain health in the face of additional toxins.  This is also not intended for people who are already fairly lean (10-14% body fat).  It is designed for obese and severely overweight people who want to lose fat as fast as possible.


Unfortunately, some women are just more prone to carrying weight in their middle instead of their hips and thighs. Sometimes, it’s genetics—maybe your mother was more apple-shaped. Belly fat can also increase around menopause, or for women who have polycystic ovary syndrome (PCOS). Even certain lifestyle habits, from lack of sleep to stress, can make your belly grow. To lose belly fat, talking with a doctor about what other factors may be affecting your weight gain can be a good place to start. From there, you can craft a belly fat busting routine.
The prevailing formula for a long time on how much fat you’re going to burn was calories in minus calories out, based on your basal metabolic rate (BMR) and exercise efforts, explains strength and performance specialist Joel Seedman, Ph.D., owner of Advanced Human Performance in Atlanta. But with all the different biochemical reactions in the body, hormonal response, and endocrine function, there are an infinite number of factors that can affect how your body is storing and breaking down calories.
×