Sometimes, when I’m cooking in my kitchen, I’ll absentmindedly start practicing my old ballet moves: tendus, pliés, and battements. Or, when I’m walking down the hall after hours at work, I’ll mark a ...

It’s generally not a good idea to take a high-energy class like, say, kickboxing, on four hours of sleep and after working a full day. But not too long ago, that’s exactly what I did. A while back, I ...