Top 7 Tricks to the Flat Abs Diet

7. Do boxing as part of your cardio exercise. This will work your core to flatten your belly. Throwing punches and twisting works your ab muscles well. Try about 15 min. 3 times per week of boxing to lose about 2 inches in your midsection within 4 weeks. Also punching while holding 1-2 lb. weights for 8 min. and then alternating arms and repeating without the weights faster for 8 more minutes will work great to get those flat abs.