Interesting findings; kinda useless sample size though.

Here is my personal experience with coffee & exercise.

I've never been a coffee drinker. Maybe I'd drink 5 cups in a year.

I started back into bicycling after about a 25 year layoff. After 4 mos of 60 miles per week of riding I got my avg. speed up to regularly being about 16+ mph over a particular 20 mile circuit.

During a professional bike fit the fitter, an ex pro cyclist, suggested I drink a caffinated cup-o-joe just before I do my daily 20 mile circuit. I began doing that. Within days I'd picked up my avg speed by 1mph, then it was two! That was after months of the same average speed (I thought I'd plateaued).

I'd say coffee has had a positive effect on my avg. speed and excercise for me so now I keep drinking a cup just before taking off, otherwise I don't drink it at all.

YMMV.

..rickko..