Examining the Circadian Timing Effects of the Hypotensive Response to Exercise

Participation Deadline: 09/01/2026
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Description

This fully counterbalanced, within-subject, randomized crossover trial will examine the time-of-day dependent hypotensive effect of exercise in adults aged 18-39 years with elevated blood pressure or stage 1 hypertension. To examine this, participants will complete an assessment of dim-light melatonin onset (DLMO), the gold standard assessment of individual circadian phase, which will be used to subsequently prescribe three exercise sessions in the morning (10 hours after DLMO), afternoon (15 hours after DLMO), and evening (20 hours after DLMO) with 24-hour blood pressure assessment before and after each exercise sessions.