Fitness columnist Jill Barker on 220 minutes each week

220 minutes. 3 hours 40 minutes is how much time people need to spend each week being active in order to stay fit.

Mutsumi Takahashi talks to the fitness guru about what that really means, and to find out which exercises are better.

Click the video to the right to see the full interview.

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  Jill Barker explains how often you need to exercise in order to stay fit (July 15, 2011)