Your running watch knows your pace, heart rate, and VO2 max. But it doesn't know you barely slept, had a stressful week, or you’re fighting a cold.
So why are you letting it make your training decisions?

Your running watch knows your pace, heart rate, and VO2 max. But it doesn't know you barely slept, had a stressful week, or you’re fighting a cold.
So why are you letting it make your training decisions?