Actively Recruiting
Examining the Circadian Timing Effects of the Hypotensive Response to Exercise
Led by Freda Patterson · Updated on 2025-08-17
30
Participants Needed
1
Research Sites
58 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
The goal of this study is to learn how exercise timing affects blood pressure in adults with elevated or high blood pressure. Exercise can influence the body's natural 24-hour rhythms, including blood pressure patterns. A single exercise session can lower blood pressure for up to 24 hours, but it is not fully understood how the time-of-day for exercise affects this response. The main question this study aims to answer is: • When the same participant exercises at different times of day (morning, afternoon, or evening), how does this affect the participant's blood pressure over the next 24 hours? Participants will: * Undergo an in-lab assessment of individual biological rhythm that will indicate the clock-time for an individual's biological night * Complete 3 supervised treadmill exercise sessions * 1 in the biological morning (biological night + 10 hours) * 1 in the biological afternoon (biological night + 15 hours) * 1 in the biological evening (biological night + 20 hours) * Complete a 24-hour blood pressure assessment before and after each exercise session
CONDITIONS
Official Title
Examining the Circadian Timing Effects of the Hypotensive Response to Exercise
Who Can Participate
Eligibility Criteria
You may qualify if you...
- 18-39 Years old
- Resting blood pressure greater than or equal to 120/80 mmHg or less than 140/90 mmHg
You will not qualify if you...
- Diagnosis or history of chronic or autoimmune disease (i.e., cardiovascular, metabolic, renal, endocrine, cancer)
- Diagnosis or history of sleep disorder (i.e., obstructive sleep apnea, insomnia, restless leg syndrome)
- Alcohol or drug dependence
- Elevated risk for sleep disorders
- Elevated risk for clinical depression
- Normotensive (blood pressure less than 120/80 mmHg) or stage 2+ hypertension (blood pressure greater than or equal to 140/90 mmHg)
- Body mass index less than 18.5 or greater than 35 kg/m2
- Self-reported use of sleep medications/supplements (e.g., melatonin)
- Self-reported use of medications influencing vascular physiology (e.g., antihypertensive medications, weight loss medications)
- Highly physically active (greater than or equal to 300 minutes moderate-to-vigorous physical activity per week)
- Currently pregnant or breastfeeding
- Current tobacco use (greater than or equal to 1 cigarette in the past month)
- Nighttime or rotating shift work within the last 3 months
- Contraindications to aerobic exercise
AI-Screening
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Trial Site Locations
Total: 1 location
1
University of Delaware
Newark, Delaware, United States, 19713
Actively Recruiting
Research Team
F
Freda Patterson, PhD
CONTACT
T
Thomas Keiser
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
3
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