I have long believed that to be healthy we need to balance the yin and yang in our lives, and if we do not get enough yin – rest, recovery, rejuvenation – then our bodies force us to, in the form of illness or injury. And indeed, any time I look back on my life and remember times when I was completely taken out by a virus or, in one spectacularly debilitating case in 2019, injury, I absolutely know that the time preceding that was one of stress and exhaustion. Sometimes that can’t be helped, of course. I had two…