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Related Concept Videos

Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Assessment of radial pulse01:11

Assessment of radial pulse

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Assessment of Radial Pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
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Assessment of the Cardiovascular System I: Subjective Data01:23

Assessment of the Cardiovascular System I: Subjective Data

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A thorough health history and physical assessment are essential for identifying cardiovascular disease (CVD) symptoms and distinguishing them from other health issues.
Initial Enquiry
Ask the patient about their primary concern and thoroughly explore all reported symptoms.
Medical History
Investigate past illnesses affecting the cardiovascular system, such as angina, anemia, rheumatic fever, congenital heart disease, stroke, thrombophlebitis, dysrhythmias, varicosities
Inquire about symptoms...
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Updated: Feb 28, 2026

A Community-based Stress Management Program: Using Wearable Devices to Assess Whole Body Physiological Responses in Non-laboratory Settings
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Disconnection Between Self-Reported Wellbeing and Heart Rate Variability from Wearables.

Corey T Ungaro1, Anthony S Wolfe2, Zadok J Isaacs2

  • 1Gatorade Sports Science Institute, PepsiCo R&D, Chicago, IL 60607, USA.

Sensors (Basel, Switzerland)
|February 27, 2026
PubMed
Summary
This summary is machine-generated.

Daily feelings of energy may not align with heart rate variability (HRV) metrics. This suggests caution is needed when using subjective readiness for personalized health recommendations based on HRV.

Keywords:
activity trackerhealthheart rate variabilityreadinessrecoverywearableswellbeing

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Area of Science:

  • Sports Medicine
  • Physiology
  • Wearable Technology

Background:

  • Heart rate variability (HRV) is a biometric used to assess physiological readiness.
  • Subjective self-reports are also used to gauge daily readiness.
  • The correlation between subjective readiness and objective HRV requires further investigation.

Purpose of the Study:

  • To investigate the association between self-reported emotional and mental readiness and overnight resting heart rate variability (HRV).
  • To determine if subjective feelings of stress, nervousness, or energy correlate with objective HRV measurements.

Main Methods:

  • Utilized activity tracker data from 39 participants (21 males, 18 females) over three months.
  • Collected data on HRV, resting heart rate, sleep metrics, and daily self-reported factors including stress, nervousness, and energy levels.
  • Analyzed associations between self-reported feelings and overnight resting HRV.

Main Results:

  • No significant association was found between self-reported stress or nervousness and HRV.
  • A significant negative association was observed between feeling energized and HRV (p < 0.01).
  • Participants reporting feeling energized had lower HRV compared to those not feeling energized.

Conclusions:

  • Subjective feelings of readiness may not accurately reflect objective biometric data like HRV.
  • Readiness scores and personalized health recommendations should consider potential discrepancies between subjective reports and HRV.
  • Caution is advised when relying solely on HRV-based recommendations for health and wellness guidance.