Biggest Loser trainers reveal below two of their favorite moves for flattening your abs -- no matter what your fitness level.
- Get on the ball
Do 5 to 8 minutes of crunches on a stability ball to isolate the transverse abdominis and rectus abdominis, the muscles that go straight across and up and down your abs.
- Ride on
Do up to 10 minutes of bicycle pedaling in the air while you are lying on your back to work your abdominals.
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