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Related Concept Videos

Observational Studies01:11

Observational Studies

Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...
Longitudinal Research02:20

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
Data Collection by Observations01:08

Data Collection by Observations

Data collection refers to a systematic way of obtaining, observing, measuring, and analyzing accurate information. Observational studies are one of the most widely used methods of data collection. It involves collecting data by observing the behavior and physical characteristics of a sample without making any modifications to the sample.
An astronomer viewing the motion and brightness of stars in the sky and recording the data is an example of observational data collection. A botanist recording...
Longitudinal Studies01:26

Longitudinal Studies

Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
Introduction to Stress and Lifestyle01:27

Introduction to Stress and Lifestyle

Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...

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Related Experiment Video

Updated: May 8, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
05:59

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Associations between sedentary behavior and allostatic load: The 1970 British Cohort Study.

Aiden J Chauntry1, Jake C Diana2, Qinghua Li3

  • 1NIRSense Inc., Morrisville, NC, USA; Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Psychoneuroendocrinology
|May 6, 2026
PubMed
Summary

Higher total sedentary time (SB) and fewer breaks increase allostatic load (AL), a marker of physiological dysregulation linked to cardiometabolic disease risk. Reducing SB and increasing breaks may mitigate this risk.

Keywords:
BiomarkersChronic diseasePhysiological stressSedentary breaksSitting

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Physical Activity Measurement in Children Accepting Table Tennis Training
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Last Updated: May 8, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
05:59

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Physical Activity Measurement in Children Accepting Table Tennis Training
06:51

Physical Activity Measurement in Children Accepting Table Tennis Training

Published on: July 27, 2022

Area of Science:

  • Physiology
  • Public Health
  • Epidemiology

Background:

  • Chronic psychological stress elevates allostatic load (AL), a state of multisystem dysregulation, increasing cardiometabolic disease (CMD) risk.
  • Moderate-to-vigorous physical activity (MVPA) is linked to lower AL, but the relationship with sedentary behavior (SB) is less understood.
  • This study investigates the association between various SB metrics and AL in middle-aged adults.

Purpose of the Study:

  • To examine the relationship between different measures of sedentary behavior (SB) and allostatic load (AL).
  • To determine if total SB time, SB breaks, or SB bout duration are associated with higher AL.
  • To inform potential public health strategies for mitigating stress-related CMD risk.

Main Methods:

  • Utilized data from 8581 participants (mean age 46.8 years, 52% female) from the 1970 British Cohort Study.
  • Assessed SB using activPAL3 accelerometry, measuring total SB time, SB break rate, and mean SB bout duration.
  • Measured seven AL biomarkers (inflammatory, cardiovascular, metabolic) and defined high AL as ≥2 biomarkers in the highest-risk quartile. Logistic regression adjusted for MVPA and covariates.

Main Results:

  • Each additional hour of total SB per day was associated with a 5% increase in the odds of high AL (OR=1.05).
  • Each additional SB break per hour was associated with a 3% decrease in the odds of high AL (OR=0.97).
  • Mean SB bout duration showed no significant association with AL after full adjustment.

Conclusions:

  • Increased total sedentary time and reduced frequency of breaks during sedentary periods are linked to higher allostatic load.
  • Findings suggest that reducing overall sedentary time and increasing interruptions to sedentary behavior may be viable strategies.
  • Further longitudinal and experimental research is needed to confirm causality and clinical implications for mitigating stress-induced CMD risk.