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Related Concept Videos

Hypoxia01:23

Hypoxia

992
Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
992
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

765
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...
765
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

967
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...
967
Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure

192
Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
Oxygen therapy is vital in increasing and maintaining blood oxygen levels in PAH patients. As a result, it aids in reducing fatigue,...
192

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Related Experiment Video

Updated: Jun 19, 2025

Delivery of In Vivo Acute Intermittent Hypoxia in Neonatal Rodents to Prime Subventricular Zone-derived Neural Progenitor Cell Cultures
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Controlled Hypoxia Acutely Prevents Physical Inactivity-Induced Peripheral BDNF Decline.

Yves Duderstadt1,2,3, Stefanie Schreiber2,4,5,6,7, Johannes Burtscher8

  • 1Division of Cardiology and Angiology, University Hospital Magdeburg, 39120 Magdeburg, Germany.

International Journal of Molecular Sciences
|July 27, 2024
PubMed
Summary

Controlled normobaric hypoxia (NH) may counteract the decline in brain-derived neurotrophic factor (BDNF) caused by physical inactivity. This highlights the importance of an active lifestyle for maintaining BDNF levels.

Keywords:
BDNFcognitionhypoxiaphysical inactivity

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Area of Science:

  • Neuroscience and Physiology
  • Human Physiology
  • Biochemistry

Background:

  • Brain-derived neurotrophic factor (BDNF) is vital for neuronal plasticity and cognitive function.
  • Physical inactivity is associated with reduced BDNF levels, potentially impacting cognitive health.
  • The effects of hypoxia on BDNF during inactivity are not well understood.

Purpose of the Study:

  • To investigate the impact of controlled normobaric hypoxia (NH) combined with physical inactivity on blood BDNF levels.
  • To assess the influence of NH and inactivity on executive functions.
  • To compare BDNF changes under normoxia (NOR) versus NH during a resting period.

Main Methods:

  • A randomized controlled cross-over study involving 25 healthy adults.
  • Participants underwent a 30-minute resting phase followed by 90 minutes of either NOR or NH (SpO2 85-80%).
  • Serum and plasma BDNF levels, heart rate, and SpO2 were monitored; cognitive tests were administered before and after exposure.

Main Results:

  • NH significantly reduced SpO2 and increased heart rate.
  • Resting under NOR led to significant reductions in serum and plasma BDNF.
  • NH prevented the decline in BDNF observed during normoxic inactivity; a 24-hour follow-up showed BDNF decline in both conditions.

Conclusions:

  • Controlled normobaric hypoxia (NH) may mitigate the decrease in BDNF associated with physical inactivity.
  • Findings underscore the importance of physical activity for maintaining optimal BDNF levels.
  • Standardized protocols are necessary for reliable BDNF measurement in serum and plasma.