Studies related to Cortisol and Caffeine

Caffeinated Chewing Gum Increases Repeated Sprint Performance And Augments Increases In Testosterone In Competitive Cyclists

Effect Decrease
Trial Design Double blind
Trial Length 24 hours
Number of Subjects 9
Sex Male
Age Range 18-29, 30-44
Body Types Trained, Average
Notes for this study:
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.

Full details on all 4 studies are available to Examine Members. Try out the Examine Membership with a 14-day free trial.

Already a Member? Log in now to access.