Effect of Sun Tai Chi on the Cardiopulmonary System and Mental Health in University Students

Inclusion Criteria: * Undergraduate university students * Aged 18 to 29 years * Both sexes * Present mental health symptoms assessed by the Depression Anxiety Stress Scales - 21 Items (DASS-21) questionnaire, according to cutoff points established by Lovibond et al., ranging from mild to severe in any of the subscales of stress (score 15 to 33), anxiety (score 8 to 19), or depression (score 10 to 27). * Report a healthy physical condition suitable for Tai Chi practice (self-reported). Exclusion Criteria: * Engage in a high level of physical activity according to the International Physical Activity Questionnaire (IPAQ) or have regularly practiced moderate to high intensity physical activity in the last 3 months. * Report chronic illnesses that limit or contraindicate the practice of exercises required in Tai Chi. * Present cardiovascular, pulmonary, or neurological diseases. * Exhibit either no mental health impairment or severe impairment according to cutoff scores established by Lovibond et al. in the DASS-21 questionnaire (stress subscale score lower than 15 or greater than 33, anxiety subscale score lower than 8 or greater than 19, depression subscale score lower than 10 or greater than 27). * Present specific psychiatric diagnoses, such as Attention-Deficit/Hyperactivity Disorder (ADHD), self-reported. * Consume medications for mental health treatment. * Consume medications or substances that influence cardiac autonomic modulation (e.g., beta-blockers).