https://www.fitandwell.com/exercise/if-you-think-the-harder-you-train-the-fitter-youll-get-you-are-wrong-according-to-this-expert-heres-what-you-need-to-know
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6/15/25 at 5:03am
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Fitandwell.com
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Maddy Biddulph
Follow this scientist’s formula to get fit
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