Caffeinated Chewing Gum Increases Repeated Sprint Performance And Augments Increases In Testosterone In Competitive Cyclists
Notes for this study:
|Number of Subjects
The expected reduction in power throughout the trial was attenuated with caffeine ingestion; ended up being a 5.4% improvement on intermittent sprint performance relative to placebo.
Testosterone increased in the groups consuming 240mg of caffeinated gum by 12+/-14% more than placebo, although both groups had an exercise-dependent increase in testosterone. Oddly, cortisol was reduced in this study.