Related Experiment Video
Updated: Jun 23, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
Published on: June 5, 2019
CIRCADIAN BLOOD PRESSURE VARIABILITY AND EXERCISE THERAPY.
A Havelková1, J Siegelová, B Fišer
1Department of Functional Diagnostics and Rehabilitation, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
Cardiovascular rehabilitation timing impacts blood pressure. Morning exercise (9:00-10:15 AM) increased systolic and diastolic pressure, while afternoon sessions (1:30-2:45 PM) decreased it, compared to non-rehab days.
Area of Science:
- Cardiology
- Exercise Physiology
Background:
- Myocardial infarction (MI) patients benefit from cardiovascular rehabilitation.
- Blood pressure (BP) management is crucial post-MI.
- The optimal timing for cardiovascular rehabilitation is not well-established.
Purpose of the Study:
- To investigate the relationship between the timing of cardiovascular rehabilitation sessions and daily blood pressure levels in post-MI patients.
- To determine if morning versus afternoon rehabilitation affects systolic and diastolic blood pressure.
Main Methods:
- Utilized 7-day ambulatory blood pressure monitoring (ABPM) in post-MI patients undergoing rehabilitation.
- Compared average daily systolic and diastolic blood pressure on rehabilitation days versus non-rehabilitation days.
- Analyzed BP trends based on specific morning (9:00-10:15 AM) and afternoon (1:30-2:45 PM) rehabilitation session times.
Main Results:
- Patients undergoing morning cardiovascular rehabilitation showed a significant increase in both systolic and diastolic blood pressure.
- Patients engaging in afternoon cardiovascular rehabilitation experienced a significant decrease in both systolic and diastolic blood pressure.
- These changes were observed in comparison to blood pressure readings on days without rehabilitation.
Conclusions:
- The timing of cardiovascular rehabilitation significantly influences blood pressure in myocardial infarction survivors.
- Afternoon rehabilitation sessions may be more beneficial for blood pressure reduction post-MI.
- Further research is warranted to optimize cardiovascular rehabilitation protocols based on time of day.
Related Concept Videos
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Alterations in Blood Pressure
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart beats)...
Measurement of Blood Pressure
Exercise and Cardiovascular Response
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Factors affecting Blood pressure
Physiological Factors:
Neural Regulation of Blood Pressure
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
