I'd like to see the results from comparing coffee, tea, a caffeine-free herbal tea, water, a break without any substance, a break at your workspace vs a break a

I'd like to see the results from comparing coffee, tea, a caffeine-free herbal tea, water, a break without any substance, a break at your workspace vs a break at a breakroom some distance away, sitting while drinking vs standing while drinking, sun vs indoors, conversation vs silence, and so on.