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What if we said you could run farther and faster, while sidestepping fatigue and avoiding injury, simply by incorporating precisely planned recovery intervals? That’s right, we’re talking about the ...

There's no shortage of TikTok fitness challenges involving numbers that people have been loving lately – the 3-2-1 method, the 12-3-30 workout, the 25-7-2 Stairmaster workout – you get the idea. The ...