Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Heart Failure V: Medical Management01:30

Heart Failure V: Medical Management

626
Medical Management of Acute Decompensated Heart Failure (ADHF)The primary goals of therapy for patients hospitalized with acute decompensated heart failure (ADHF) include:Relieving symptomsOptimizing volume statusSupporting oxygenation and ventilationMaintaining cardiac output (CO) and end-organ perfusionIdentifying and addressing the cause of ADHFPreventing complicationsProviding patient education on factors precipitating HF exacerbationPlanning for dischargeOngoing monitoring and assessment...
626
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

3.8K
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...
3.8K
Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

3.4K
Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart...
3.4K
Exercise Stress Test01:26

Exercise Stress Test

2.3K
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
2.3K
Heart Failure VII: Nursing Interventions01:30

Heart Failure VII: Nursing Interventions

787
The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...
787
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

3.3K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
3.3K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Individual mHLA-DR trajectories in the ICU as predictors of early infections following liver transplantation: a prospective observational study.

Critical care (London, England)·2025
Same author

Effect of repeated sprint training in hypoxia on acute and chronic redox balance modulation.

Free radical research·2025
Same author

Celebrating 100 years of VO2max.

QJM : monthly journal of the Association of Physicians·2023
Same author

Reliability of individual acceleration-speed profile in-situ in elite youth soccer players.

Journal of biomechanics·2023
Same author

Effects of wearable resistance load placement on neuromuscular activity and stride kinematics: A preliminary study.

South African journal of sports medicine·2023
Same author

Neuromuscular fatigability during repeated sprints assessed with an innovative cycle ergometer.

European journal of applied physiology·2022
Same journal

Improving assessment of post-exercise hypotension as a predictor of training efficacy.

International journal of sports medicine·2026
Same journal

Neuromuscular electrical stimulation after anterior cruciate ligament reconstruction.

International journal of sports medicine·2026
Same journal

Exercise Intensity Effects on Irisin in Master Athletes and Links With Maximal Oxygen Uptake and Body Fat.

International journal of sports medicine·2026
Same journal

Evolution of the Australian Institute of Sport Supplement Program over the last 25 years.

International journal of sports medicine·2026
Same journal

Preseason Passive Torque Asymmetries in Soccer Players with Hamstring Strain Injury.

International journal of sports medicine·2026
Same journal

Musculoskeletal Burden in German Equestrians: Hip-Specific Symptoms and Risk Factors.

International journal of sports medicine·2026
See all related articles

Related Experiment Video

Updated: May 2, 2026

Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach
07:49

Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach

Published on: July 21, 2023

2.0K

Tapering for marathon and cardiac autonomic function.

B Hug1, L Heyer1, N Naef1

  • 1Swiss Federal Institute of Sport, Section for Elite Sport, Magglingen, Switzerland.

International Journal of Sports Medicine
|March 6, 2014
PubMed
Summary
This summary is machine-generated.

Slower post-exercise heart rate recovery (HRR) during marathon tapering may indicate improved running performance. Heart rate variability (HRV) changes, however, showed little additional value for performance monitoring.

More Related Videos

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

20.7K
Quantitative Autonomic Testing
11:40

Quantitative Autonomic Testing

Published on: July 19, 2011

59.2K

Related Experiment Videos

Last Updated: May 2, 2026

Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach
07:49

Author Spotlight: Investigating HR-Dependent Cardiac Function in Mouse Models Through a Novel Atrial-Pacing Approach

Published on: July 21, 2023

2.0K
Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

20.7K
Quantitative Autonomic Testing
11:40

Quantitative Autonomic Testing

Published on: July 19, 2011

59.2K

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Cardiovascular Research

Background:

  • Marathon runners undergo overload and tapering phases to optimize performance.
  • Monitoring physiological responses like heart rate recovery (HRR) and heart rate variability (HRV) is crucial during training cycles.
  • Understanding the relationship between these physiological markers and performance changes is essential for effective training periodization.

Purpose of the Study:

  • To investigate changes in post-exercise heart rate recovery (HRR) and heart rate variability (HRV) in marathon runners during an overload-tapering training paradigm.
  • To examine the relationship between these physiological changes and running performance.
  • To determine the utility of HRR and HRV as indicators of performance during tapering.

Main Methods:

  • Nine male marathon runners participated in a 6-week training program: 3 weeks of overload followed by 3 weeks of tapering.
  • Participants performed exhaustive running tests to determine time to exhaustion (Tlim) before, during, and after the training phases.
  • Post-exercise HRR (HRR60s) and vagal-related HRV (RMSSD5-10min) were measured after each exhaustive test.

Main Results:

  • Time to exhaustion (Tlim) did not significantly change during the overload phase but increased during the second week of tapering.
  • Vagal-related HRV (RMSSD5-10min) was reduced after the second week of tapering compared to the overload phase.
  • Improvements in Tlim during tapering were negatively correlated with changes in HRR60s (r = -0.84, P = 0.005) but not with RMSSD5-10min (r = -0.21, P = 0.59).

Conclusions:

  • A slower heart rate recovery (HRR) during the tapering phase of marathon training may be an indicator of enhanced running performance.
  • The monitoring of heart rate variability (HRV) changes, as assessed in this study (post-exercise on a single day), may offer limited or no additional value for performance prediction during tapering.
  • These findings suggest that HRR is a more sensitive marker than HRV for tracking performance adaptations during the tapering phase in marathon runners.