Work the core! Fitness secrets of Olympic stars

Related: Fitness

1. Fitness
   1. Need workout motivation? Try a virtual partner
   2. Born to run barefoot? Some end up getting injured
   3. Need a little 'fitspiration'? Try TODAY tips
   4. What are the 25 best cities for walking?
   5. Do ice baths really prevent muscle aches?
2. Headlines from AOL That's Fit
   1. Some Good News? Are Americans Cutting Back on Sugar Intake?
   2. I Ditched Dieting -- And So Should You
   3. Kate Bosworth's Fit Routine
   4. Should We Fear Our Genetics?
   5. What Nutritionists Order When Eating Out
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