There are different types of HIIT but an easy one to begin with is to simply warm up for 3 minutes on an elliptical machine or by walking.  Then work out for 30 seconds so that at the end of the exercise you feel satisfied.  Reduce the speed to slow down to a moderate pace.  Do this 7 more times or for total 8 intervals. Start with one interval and as your body is ready to take more increase the intervals.  Studies show that HIIT to be the absolute premier cardio for weight loss and optimal health as compared to longer, traditional cardio.
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.
Sometimes, to whip your body into shape, you have to get a little nutty. While nuts are high in fat, it’s that very fat that makes them such powerful weapons in the war against a ballooning belly. In fact, research from Reina Sofia University Hospital reveals that study participants who consumed a diet rich in monounsaturated fats, like those in nuts, over a 28-day period gained less belly fat than their saturated fat-consuming counterparts while improving their insulin sensitivity.

"As we head into colder months with less sun exposure, vitamin D intake from food becomes extremely important. Research shows that low levels of vitamin D may be correlated with abdominal obesity," says Kayleen St.John, R.D., executive director of Nutrition and Strategic Development of Euphebe. "Mushrooms grown under UV light should be incorporated into belly fat-fighting meals." Try this Italian Mushroom and Bean Soup.
3. Twist: One foot placed slightly in front of the other with body facing the corner. This should resemble the movement of wringing a towel while taking knees further “inward” and opening body in the opposite direction. Start with knees bent and straighten with the twist by lifting the hip and leading it to the opposite corner.10 reps each side, then 10 again (total of 20, alternating after 10)
When your body is low on calcium, it produces a hormone that signals the body to store visceral fat. Meeting your recommended daily calcium needs (that’s 1,000 milligrams for adults) can help reduce levels of this hormone. And a recent study published in Obesity Research found that calcium from dairy has a stronger effect than calcium from other sources. I recommend eating low-fat Greek yogurt as a daily snack (just six ounces contain about 20 percent of your recommended dietary allowance for calcium), though any low-fat dairy will do.
"A study published in study published in Nutrition Journal linked calcium and vitamin D supplementation over 12 weeks with belly fat reduction in obese and overweight college students," says Amidor. "These participants also lowered their calories during this time frame. Although the study was done with supplements, milk is brimming with both calcium and vitamin D, and can be part of a healthy weight loss plan."
And how often to work out to get rid of belly fat? Well, as you know, too much cortisol can counteract your belly fat loss efforts. Belalij suggests doing 30-minute sessions, three times per week. “As you start to lose belly fat your body will want to cling on more and more to what is left, so you must increase the intensity or duration of your workouts, the more fat you lose,” Belalij says. And Hughes agrees:
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