The purpose of this quasi-experiment is to determine the effect a high dose of caffeine (5mg/kg.bw) has on recovery following vigorous exercise in physically active adults. While the effects of caffeine are well-established, there is conflicting evidence on its impact on exercise recovery, particularly high doses of caffeine on vigorous exercise. Participants will be physically active Keene State College students recruited through emails, bulletin board posters, and digital signups. Initial screening will be done on participants to ensure they are fit to participate in this trial. A placebo-controlled design will be used to assess the difference in heart rate (HR) recovery between the baseline (placebo with no caffeine) and the experimental condition (with caffeine). It is hypothesized that high caffeine consumption prior to vigorous physical activity on a treadmill will have an increase in heart rate variability (HRV) suggesting an improved rate of recovery and performance in active college students.