Four Ways to Figure Out What Day a Date Falls On

Being able to instantly pluck the day of the week for a given date out of your mind can seem like a magic trick, but it’s actually not that difficult—if you’re willing to put in a little work and do a little math.

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Your 'Max Heart Rate' Is Probably Wrong

If you’ve ever worried about your heart rate during exercise being too high or too low, you’ll want to read this. Your "heart rate zone...