I don't stretch before coding per se, because I am usually standing while coding, so I am already alert. but I do stretches in between coding sessions, like may

I don't stretch before coding per se, because I am usually standing while coding, so I am already alert. but I do stretches in between coding sessions, like may be every 20-30 minutes. My wife is a physical therapist and I usually follow most of her advise to keep myself energized throughout a marathon of coding.