I got misclassified! @SamForbes88 https://github.com/ryanjay0/miles-deep/ …https://twitter.com/SamForbes88/status/817491048029102080 …
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is that the same as intervals of fast/slow? That's what I do - less knee pain and I am clumsy so scared I'll fall when I run fast

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HIIT is basically going fast and slow, but with some research on it. https://en.wikipedia.org/wiki/High-intensity_interval_training …
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