A Comparison of Acute Psychobiological Responses to Laboratory Stress Tests

Inclusion Criteria: Participants who… * have read and signed the study informed consent * are healthy, recreationally active men and women aged 18-35 years * are willing to provide saliva samples throughout through the duration of the study * are using monophasic birth control (women only) Exclusion Criteria: Participants who… * have a recent history or are a current smoker * are currently taking prescription/Over-the-counter medication (excluding females taking oral combined contraception * consume ≥ 91 units of alcohol per month * have a clinically diagnosed history of cardiovascular and/or metabolic disease including diabetes and abnormal blood pressure * are pregnant * have a recent or ongoing viral or bacterial illness in past 4 weeks * have a clinically diagnosed psychiatric disorder * have a clinically diagnosed sleeping disorder * have a clinically diagnosed gambling addiction * BMI ≥ 30 kg/m2 - calculated in the online health screening questionnaire * Endurance trained or engage in ≥3.5 hours of physical activity a week