Today I learned a lesson the hard way. I cannot drink sports drinks before working out.
An hour before running, I drank a pre-workout formula drink. The first few thousand meters of speed work at track practice were okay. But soon I got dizzy, nauseous, and headachy. And, worst of all, slow.
After practice, a teammate asked what was up today. I told her my symptoms and she immediately asked if I drank a sports drink before running.
And now I know: even if it’s labeled “pre-workout”, my stomach is not interested in running with it in my belly.