In our gym 18 laps equals one mile. Normally I run a mile in 6:15 but I want to get it down to around 5:45 if I can. I am a 13 yr old girl, 5'4'', 105 pounds, am in physical shape to go faster just not sure how. How can I improve my time, and how long would each lap need to be to get a much faster time??
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