Remember, there is no such thing as spot training! You need to be fit all over before you’ll see results in your trouble areas. If you want to torch calories, my advice is include compound exercises into your strength training routine, and add sprinting intervals into steady-state cardio routines. This helps your body get into fat burning mode, as well as burn more calories overall. When it comes to your ab exercises, keep it interesting and try sets of alternating speeds. With each move, try a slow set of reps, followed by a much quicker set. Repeat this for each ab exercise:
Plank Extensions on Ball
Rest your forearms on an exercise ball and hold your body in a straight line in traditional plank position. Keeping your torso tight, slowly extend your arms up away from your abs. Hold for 15-25 beats. Aim for 3 sets.
Side Plank with Lift
Start in the side plank position, holding your weight up on your right elbow. Keeping your balance, raise your left leg into the air. Hold for a moment then return to your starting position. Aim for 2 set of 10-15 reps on each side.
Start off in a plank position, with a paper-plate under each foot. Simulating a running motion, slide your feet up to your chest, one after the other. Aim for 3 sets of 16-20 reps.