Exercise Intensity on Brain & Mental Health in Stress

Inclusion Criteria: Participants experiencing sub-clinical levels of stress-related symptoms: * Age: 20-40 years * Absence of contraindications to physical exercise * Do not participate in any other study * Total score on the self-assessment scale 4-factor Shirom-Melamed Burnout Measure-19 lower than or equal to 4.00 Exclusion Criteria: * Medical contraindication to catheterization of the antecubital vein and blood sampling * Dementia * Alcohol abuse * Smoking * Chronic medication that is considered to affect study outcomes * Chronic disease/syndrome such as migraine, fibromyalgia, chronic fatigue syndrome, bipolar syndrome, high blood pressure, cardiovascular disease, chronic obstructive pulmonary disease (COPD) or other lung disease * Post-COVID * Other somatic diseases, disorders, or injuries that may affect the physical ability during physical exercise