Unless you can do these at a seriously high metabolic rate, crunches, and other ab movements, strengthen and build abdominal muscle, do not burn off the belly fat. Belly fat-loss occurs with high intensity training throughout the entire body. That means you should HIIT the fat away, not try to crunch it away.
George Mangum M.A is the fitness director for Heritage Medical Group & Heritage LifeFit Fitness Dep, which has fitness programs for all age groups. Contact him at firstname.lastname@example.org