Nine members of the University of St. Thomas Women’s basketball team, ages 18-21, volunteered to participate as subjects in this research. All subjects have played competitive basketball for at least ten years and drank less than one source of caffeine per day. Each subject participated in three separate tests. The control test included no caffeine. The liquid test consisted of 6 oz. water and 1 tablespoon coffee. The gel test was one packet of Double Latte PowerGel. The subjects ran on the treadmill for 20 minutes at a speed of 7.0 while wearing a Polar heart rate monitor. Heart rate for was recorded after each minute for each trial. The subjects performed a finger tap test for 10 seconds before and after each exercise session. The mean heart rate for rest, 1 minute, 10 minutes, and 20 minutes were analyzed. The mean numbers of finger taps for each pre and post exercise test were analyzed.
Using a paired t-test, no significant difference was found between caffeine and heart rate for any of the three tests. No significant difference was found using a paired t-test for caffeine and number of finger taps. There was a relationship between mean number of finger taps and post-exercise performance for control, liquid, and gel caffeine sources.