No Dumbbells Required: 5 Strength-Building Exercises
Classic exercises you can do almost anywhere.
By Dr. Mehmet Oz
Illustration: mckibillo
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Planks
These engage the entire core (including the lower back), while crunches primarily target the belly. Can you hold the pose for five seconds? Count that as one set. As you get stronger, hold it longer.
Published 01/23/2012
