Want strong abs? Here are 2 exercises you should be doing; the plank and bicycle crunches.
Assume the push up position. Engage your abs and tighten your entire body, squeezing your feet, knees and thighs together while you are lifting away from the ground. Your back should be straight, with your butt down, not piked up. Your back must remain straight, so keep your abs tight or else your back will sway as your abs drop. Hold this position for 30-45 seconds a few times a week.
Lay flat on your back, hands behind your head, feet off the ground, knees bent. Bring your left knee into your right elbow and switch. Your bent legs should be cranking like you are pedaling a bike. Be sure to keep your abs tight and work hard to bring your knees to elbows. Do 25 to start.
Remember, you cannot spot reduce a body part. To lose the belly flub you need to incorporate abdominal work with cardiovascular exercises, strength training and good nutrition.
Now go run!