I needed a coffee to warm me up.
Back in my running days (long ago) I went to a coffee shop before my run and had a couple of espressos. Then went for a run. I think it was the most effortless run I've ever had in my life. I felt like I was gliding along the running trail. It was awesome!
I've never been able to repeat the experience, but it still remains a very fond running memory.
That may count as an illegal stimulant! I don't generally have coffee before a run, but maybe I should try it.
LOL. I think a shot of espresso is mild in comparison to truly illegal options. If you happen to give it a try, please do let me know how it turns out. Cheers!