is a six minute mile fast
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is a six minute mile fast
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is a 5 minute mile fast
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speed to run a 6 minute mile
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is a six minute mile fast, what speed is a 6 minute mile, how fast is a 6.5 minute mile, what is a 6 minute mile, is a 5 minute mile fast, is a six minute mile good, how good is a 6 minute mile, speed to run a 6 minute mile, mph for a 6 minute mile, is a 4 minute mile fast, is a 9 minute mile fast, how hard is a 6 minute mile, running a 6 minute mile, run a 6 minute mile