Increase the intensity of abdominal training by either slowing down your movement, trying a more difficult exercise (for example, bicycles instead of floor crunches) or adding a small amount of weight by holding either a medicine ball or a small weight plate close to your chest.
DANIELLE'S COMMENTS: Just a reminder: adding weight, also increases your abdominal muscle mass. If you're not doing cardio and eating clean ----nobody will ever see your abs, no matter how big they are. We must burn the layers of FAT, in order to reveal the MUSCLE.
Tip provided by www.bodyforlife.com