I. INTRODUCTION The study of issues affecting sport performance is one of the most important tasks and concerns of researchers in the field of sports sciences. The issue of sport supplements is one of the most important concerns that demands attention in our country more than the past due to their effect on performance, widespread use by athletes and increased awareness among instructors. Caffeine is a quasi-crystalline, white and bitter tasted substance chemically called 1,3,7-trimethyl xant...

I. INTRODUCTION The study of issues affecting sport performance is one of the most important tasks and concerns of researchers in the field of sports sciences. The issue of sport supplements is one of the most important concerns that demands attention in our country more than the past due to their effect on performance, widespread use by athletes and increased awareness among instructors. Caffeine is a quasi-crystalline, white and bitter tasted substance chemically called 1,3,7-trimethyl xant...