The effect of caffeine intake and mouth rinse on strength and vertical jump performance in women athletes

There are various results in the literature regarding the effects of caffeine intake and mouth rinse on physical performance. In addition, there is no study examining the strength and vertical jump performance of both caffeine supplement forms in combination. Moreover, the number of studies on female athletes is very scarce. The aim of this study is to examine the effects of 3 mg/kg caffeine intake, 300 mg caffeine mouth rinse and the combination of both on strength and vertical jump performance in female athletes with different caffeine consumption frequencies. A total of 35 female athletes participated in this study. Participants were divided into 2 groups according to their caffeine consumption frequency and participated in a total of 5 test days: control trial with no intake and no rinse, placebo intake and placebo rinse, caffeine intake and placebo rinse, placebo intake and caffeine rinse, caffeine intake and caffeine rinse. Participants were rinsed for 10 seconds in the mouth before each test trial, after a 60-minute waiting period after their caffeine intake. Test trials were carried out in the form of 2 hand-grip, 2 back strength and 1 vertical jump (repeated for 15 seconds with hands on the waist). In addition, at the end of the test protocol, the participants were asked about their perceived exertion and solution estimates. As a result, caffeine intake, rinsing and combining both did not increase strength performance and perceived exertion level but caffeine intake increased peak power output in vertical jump performance; It was revealed that the combined trial also increased the maximal jump height, peak power output and fatigue index. It was observed that the frequency of caffeine consumption of the participants in their normal lives did not affect the ergogenic effect of caffeine in this study.