where is a good place to sprint?

  • Thread starter Thread starter ??? ??2008
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??? ??2008

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I heard that sprint on the track field is the best, but I do not have any track field near my neighborhood. I can only run on the sidewalk or on the grass. I heard that sprint on the sidewalk is not good for the back, but the grass is very uneven in my place. I can only find a few places that are fairly even for grass. So Where exactly I should practice sprint?

Thank you,
 
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