The goal of this study is to learn if low-dose caffeinated coffee improves repeated sprint performance and affects energy system contributions in combat sports athletes.
The main questions it aims to answer are:
* Does low-dose caffeinated coffee (1.5 or 3 mg·kg-¹) improve peak power, mean power, and fatigue index during repeated sprint tests?
* What physiological responses (heart rate, blood lactate, perceived exertion, and energy system contributions) do participants have when consuming caffeinated coffee? Researchers compared caffeinated coffee at two doses (1.5 and 3 mg·kg-¹ body mass) to a placebo (decaffeinated coffee of identical taste and appearance) to see if low