Do you even lift, bro? If you’re serious about getting rid of that belly fat fast, resistance training might just be the key. A study from the Harvard School of Public Health found that adding weight training to adult male test subjects’ workouts significantly reduced their risk of abdominal obesity over a multi-year study period, although doing the same amount of cardio had no such effect. Research from the University of Maryland even found that just 16 weeks of weight training boosted study participants’ metabolic rates by a whopping 7.7 percent, making it easier to ditch those extra inches around your middle.
So how many carbs should you eat on your high carb day? This is highly dependent on individual metabolism. The increase should be 55%-115% of what you consume on your typical diet. I realize that this is a pretty wide range but it can be narrowed down through body type. If you have a fast metabolism (ectomorphs) then you should stay closer to the higher end of the carb range. If you have a slow metabolism (endomorphs)  then you will want to stick closer towards the low end of the carbohydrate range. Lastly, mesomorphs should stay within the mid range on their high carb days.
When food intake and carbs are low, leptin levels will lower. This will send signals to the body that energy intake is low and the metabolism must be lowered to compensate for the lack of incoming energy. When carbs are kept in the diet it will help keep elevated levels of leptin and other fat burning hormones even when total calorie intake is low.
At its core, burning fat comes down to the process of lipolysis—the breaking down of fat lipids, explains Seedman. This happens in the mitochondria of the muscles, or the powerhouses of the cells, responsible for generating the energy our cells need to do their jobs. Exercise has been shown to improve mitochondria function, which then promotes fat breakdown, Seedman adds. Plus, working out helps regulate pretty much all the hormones that optimize fat loss.