Bust Belly Bulge in 20 Minutes: Interval Ab Walk

Total time: 20 minutes

An interval-walking workout, which alternates between moderate and fast speeds, not only blasts fat, it also keeps the burn going. You'll knock off 9 percent more calories for up to 14 hours after 30 minutes of high-intensity exercise, a new Florida State University study has found. Add in ab exercises and poof! - no pooch.

The strategy: Complete your walk; indoors, do three minutes of these belly flatteners. Each one works your abs from a different angle, helping you sculpt stronger core muscles in less time.

YOUR PLAN

2 minutes: warm-up

1 minute: moderate walk

30 seconds: fast walk

1 minute: moderate walk

1 minute: fast walk

30 seconds: moderate walk

30 seconds: fast walk

1.5 minutes: moderate walk

30 seconds: fast walk

3 minutes: moderate walk

1.5 minutes: fast walk

2 minutes: moderate walk

1 minute: fast walk

2 minutes: moderate walk

2 minutes: cooldown

Ready to start? Get the exercises!