Inclusion Criteria:  Healthy or free of disease Minimum of 1 year of regular physical activity. Regular physical activity is defined by a minimum of 150 minutes of aerobic activity or performing muscle-strengthening exercises at least 2 days a week.  Exclusion Criteria:  Physically inactive Regularly used sleep aids of any kind Currently taking selective serotonin reuptake inhibitors (SSRIs) and/or 5-HTP containing supplements.