Biggest Loser trainers reveal below two of their favorite moves for flattening your abs -- no matter what your fitness level.
- Make like a superhero
Get on your stomach and lift your arms and legs off the ground like Superman. Then get up into the plank (with your back straight, feet and hands on floor) and lift one arm and the opposite leg like Spider-Man--Heather can hold it for over a minute. It works your whole core in a circle.
- Work your back
Many people forget that back strength helps support your abs. So do some back extensions on a stability ball.
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