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Old 01-14-2013, 08:22 PM   #1
Roy125
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Location: San Diego, California
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Default Calling Running Experts

Is it better exercise for me to run slower but longer (e.g. 4 miles in 40 minutes) or faster but at a shorter time (e.g. 2 miles in 15 minutes)? What are the pros and cons of both? I can do both but which one is better for my health? Or should I alternate?
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