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.
“Medicine ball slams are a dynamic, explosive, and highly metabolic exercise that does not simply target one muscle group,” explains Chris DiVecchio, trainer and founder of Premier Body & Mind. On the surface, the obliques, hamstrings, quads, biceps, and shoulders are the primary movers of this exercise. “But as time goes on and fatigue sets in, nearly every other muscle in the body, in one way or another, may become involved as a secondary mover which makes this a total gut blaster,” he adds. Doing side-to-side ball slams versus overhead slams incorporates more oblique ab work.
Work your core. When many people think of core strengthening, they think of stomach crunches. Crunches are helpful for building abdominal muscles, but contrary to popular belief, crunches won't do much to lose the layer of fat stored in your belly, and can actually cause significant damage to the spine.[34] Instead, try a workout routine that strengthens your whole core, like yoga, or try abdominal presses and planking.[35]
How to do overhead medicine ball slams: Standing tall with your feet hip-width apart, hold a medicine ball with both hands. Reach both arms overhead, fully extending your body. Slam the ball forward and down toward the ground. Extend your arms toward the ground as you slam and don’t be afraid to bend your knees as you hinge over. Squat to pick the ball up and then stand back up.
2. Eat smaller meals more frequently: “Insulin is probably the single most important factor that contributes to fat storage,” Seedman explains. This hormone is activated when you eat and responsible for shuttling nutrients into cells, either fat or muscle. A quick biology lesson: Every time you eat a meal, your blood glucose spikes, and when this goes up, so do your insulin levels. More calories at once means a larger spike in both. When these levels are sky high, it signals to your body to put nutrients into fat cells instead of muscle, causing an accumulation of fat, Seedman explains. The same thing happens when your insulin stays elevated for a prolonged period of time, which is why it’s important to let yourself become hungry before eating again, he adds. Aim for five to six meals throughout the day. 
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