The first of my three planned yoga classes is this afternoon. In the mean time I have continued to pursue vigorous exercise in private lessons at the nearby taekwondo studio.

After a few days of this, I feel better than I have in a long time. My flexibility and general comfort level have improved immediately. I begin to suspect that there's a basic need for well-balanced physical cultivation as a support for contemplative practice.

Some googling supports the idea that taekwondo (and various other traditional martial arts) is very much in sync with shikantaza practice.