Influence of caffeine on strength performance

This bachelor thesis is divided into theoretical and practical part. The theoretical part is divided into several chapters which deal with general properties of caffeine, its structure, metabolism, occurrence and effects on human organism. A special chapter deals with sports issues and the use of caffeine in sports. The practical part includes individual research into the influence of caffeine on the strenght performance and on the human organism. The aim of this work was to find out whether caffeine shows ergogenic effects at a strenght performance of 1 RM. For this, an experiment was used in which the participants underwent two tests, in one using caffeine 3 mg / kg body weight, in the other using placebo. The challenge was to lift as much weight as possible for one maximum repetition (1RM) in bench press and deadlift exercises. A total of 24 people, 17 women and 7 men with an average age of 27 years and an average BMI of 23.8 underwent the experiment. The test results showed an average improvement of 2.3 kg for deadlift and 0.3 kg for bench press. However, these values are not statistically significant (p = 0.253 and p = 0.775). Key words: caffeine, strenght performance, dietary suplements, deadlift, bench pres