:08 Minute Abs Nine tummy-trimming exercises done in 45-second intervals. But you won’t see real results unless you find time to work out the rest of you.

Pilates for Dummies Pilates strength-building mat exercises can be tricky, but in half an hour, this clear video takes you through 18.

Living Yoga AM/PM In the morning, the sun rises over a beach as you relax, meditate and pose. Later do more poses and workout stretches while night falls in Death Valley.

The Firm: Maximum Body Shaping A high-energy, action-packed 45 minutes of strength training and floor routines.

N.Y.C. Ballet Workout Company dancers review their 90-minute warm-up. You’ll never be as graceful as they are, but it’s worth a shot.