Related Experiment Video

Updated: Jun 18, 2026

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement
08:27

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement

Published on: February 22, 2022

High-intensity interval exercise training improves heart rate variability in patients following percutaneous coronary

Peter S Munk1, Noreen Butt2, Alf I Larsen1

  • 1Department of Cardiology, Stavanger University Hospital, Stavanger, Norway; Institute of Medicine, University of Bergen, Bergen, Norway.

International Journal of Cardiology
|December 8, 2009
PubMed

Insights

High-intensity exercise training improved heart rate variability (HRV) in patients after percutaneous coronary intervention (PCI). This improvement correlated with cardiorespiratory fitness but not endothelial function, suggesting a link between exercise, autonomic balance, and cardiovascular health.

Area of Science:

  • Cardiology
  • Exercise Physiology
  • Autonomic Neuroscience

Background:

  • Heart rate variability (HRV) measures predict outcomes post-myocardial infarction (MI).
  • The predictive role of HRV in coronary artery disease (CAD) patients without MI is less understood.
  • Mechanisms linking autonomic imbalance to clinical outcomes in CAD require further investigation.

Purpose of the Study:

  • To assess the impact of a 6-month high-intensity interval training (HIIT) program on HRV in patients with stable angina undergoing percutaneous coronary intervention (PCI).
  • To explore the relationship between changes in HRV, cardiorespiratory fitness (peak VO2), and endothelial function post-PCI.

Main Methods:

  • Prospective randomized controlled trial involving 40 patients post-PCI for angina.
  • Intervention group (n=20) underwent 6 months of supervised HIIT; control group (n=20) received standard care.
  • 24-hour Holter monitoring assessed HRV at baseline and 6 months; peak VO2 and endothelial function were also measured.

Main Results:

  • HIIT significantly improved time and frequency domain HRV measures and reduced mean heart rate.
  • Improvements in HRV indices (SDANN, ln RMSSD) correlated significantly with increases in peak VO2.
  • No significant correlation was observed between HRV changes and endothelial function.

Conclusions:

  • Six months of HIIT effectively enhances HRV in patients post-PCI with stable angina.
  • The positive effects of HIIT on HRV are associated with improvements in cardiorespiratory fitness.
  • HIIT's impact on HRV in this population does not appear to be mediated by changes in endothelial function.
Abstract

More Related Videos

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training07:40

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training

Published on: October 10, 2019

Related Concept Videos

Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Acute Coronary Syndrome IV: Interprofessional Care01:28

Acute Coronary Syndrome IV: Interprofessional Care

IntroductionThe management of Acute Coronary Syndrome (ACS) aims to minimize myocardial damage, preserve myocardial function, and prevent complications.Initial ManagementInpatient management involves continuous cardiac monitoring, preferably in an ICU, focusing on blood pressure, serum sodium, potassium, and creatinine levels, and urine output. Ongoing pharmacologic management is crucial for stabilizing the patient.Supplemental Oxygen: Administer supplemental oxygen if oxygen saturation is...
Coronary Artery Disease V: Interprofessional Care01:27

Coronary Artery Disease V: Interprofessional Care

Interprofessional care for coronary artery disease includes pharmacological therapy and revascularization procedures.Pharmacological therapy for Coronary Artery Disease (CAD) aims to manage symptoms, prevent complications, and improve patient outcomes through various classes of medications:Antiplatelet Agents:Aspirin and Clopidogrel: These medications inhibit platelet aggregation, preventing blood clots, which is crucial for avoiding heart attacks and strokes. Doctors often prescribe these...
Angina IV: Management01:26

Angina IV: Management

IntroductionThe management of angina requires a comprehensive approach that includes pharmacological therapies, medical procedures, and lifestyle modifications.Pharmacological TherapiesAntiplatelet agents, such as aspirin, clopidogrel, prasugrel, and ticagrelor, play a pivotal role in preventing thrombus formation in patients with angina. These medications inhibit platelet aggregation and reduce the likelihood of myocardial infarction and other cardiovascular events.Anticoagulants, including...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...