Related Experiment Video

Updated: Jun 17, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges
08:22

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges

Published on: February 25, 2016

Cortisol response to physical activity in African American toddlers attending full-time day care

Sarah J Wall1, Mary E Rudisill, L Bruce Gladden

  • 1Department of Health and Physical Education at Eastern New Mexico University, Portales, NM 88130, USA. sarah.wall@enmu.edu

Research Quarterly for Exercise and Sport
|December 23, 2009
PubMed

Insights

African American toddlers in daycare showed no significant cortisol changes after physical play. Heart rate increased, but stress hormone levels remained stable, indicating a need for further research into their physiological responses.

Area of Science:

  • Pediatric Health
  • Child Development
  • Stress Physiology

Background:

  • Cortisol levels in toddlers can indicate physiological stress.
  • Understanding stress responses in early childhood is crucial for development.
  • Daycare environments present unique social and physical contexts for children.

Purpose of the Study:

  • To investigate the cortisol response of African American toddlers during physical play in a subsidized daycare.
  • To compare cortisol levels before and after acute physical activity versus a control play condition.

Main Methods:

  • Saliva samples collected from 22 toddlers (26-45.5 months) before and after play sessions.
  • Physical play and control play conditions assessed for intensity using Actiheart monitors.
  • Cortisol levels measured to determine physiological stress response.

Main Results:

  • Heart rate and other physiological indicators were significantly elevated during physical play.
  • No statistically significant change in cortisol levels was observed pre- to post-physical play.
  • The findings suggest a complex relationship between physical activity and stress hormones in this population.

Conclusions:

  • Toddlers in this study did not exhibit a measurable cortisol change in response to acute physical play.
  • Further research is required to elucidate the nuances of cortisol regulation during physical activity in young children.
  • The study highlights the need for more investigation into the physiological stress markers in diverse early childhood settings.

More Related Videos

Collecting Hair Samples for Hair Cortisol Analysis in African Americans06:01

Collecting Hair Samples for Hair Cortisol Analysis in African Americans

Published on: June 10, 2018

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents06:15

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents

Published on: July 10, 2017

Related Concept Videos

Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...
Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
Attention-Deficit/Hyperactivity Disorder01:30

Attention-Deficit/Hyperactivity Disorder

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Exercise Stress Test01:26

Exercise Stress Test

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
Adrenal Gland Disorders01:27

Adrenal Gland Disorders

Adrenal gland disorders manifest when the production of adrenal hormones deviates from the norm, resulting in either excessive or insufficient concentrations.
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...
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...