In the winter, the step counter on my wrist reminds me that I’m way too sedentary. I spend most of the day, every work day, sitting in front of a computer, often in front of a camera where I’m lost in an endless slew of Teams meetings, only resurfacing to make a cup of coffee or tea, use the bathroom, and when I remember, to have lunch. I know I should be more active, doing more to get outside and to get my heart pumping, but when the temperatures are hovering at twenty degrees below zero...