Related Experiment Video
Updated: Apr 28, 2026
09:04
Skeletal Muscle Neurovascular Coupling, Oxidative Capacity, and Microvascular Function with 'One Stop Shop' Near-infrared Spectroscopy
Published on: February 20, 2018
12.1K
Oscillation in O2 uptake in impulse exercise
T Yano1, R Afroundeh1, R Yamanaka1
1Hokkaido University Laboratory of Exercise Physiology, Faculty of Education Kita-ku, Sapporo Japan.
Acta Physiologica Hungarica
|June 6, 2014
Summary
Oxygen uptake (VO2) oscillates during light exercise, with this oscillation intensifying after brief, high-intensity impulse exercise. This suggests a link between muscle oxygen use and transport dynamics.
Area of Science:
- Exercise Physiology
- Cardiovascular Physiology
- Muscle Metabolism
Background:
- Understanding oxygen uptake (VO2) dynamics during exercise is crucial for assessing physiological responses.
- The influence of acute, high-intensity exercise on subsequent submaximal exercise VO2 patterns requires further investigation.
Purpose of the Study:
- To determine if oxygen uptake (VO2) exhibits oscillatory behavior during light exercise.
- To investigate whether impulse exercise enhances VO2 oscillations during recovery.
Main Methods:
- Participants underwent a protocol involving rest, 5-min light exercise (25W), 10-s impulse exercise (200W), and 15-min light exercise recovery.
- Oxygen uptake (VO2) and heart rate (HR) were continuously monitored.
- Cross-correlation and power spectral density analyses were employed to assess VO2 and HR oscillations.
Main Results:
- VO2 demonstrated significant fluctuations during and immediately following impulse exercise.
- A strong negative time-lagged correlation (-4s) was observed between VO2 and HR post-impulse exercise.
- Distinct peaks in power spectral density for HR and VO2, and their cross-spectrum, indicated oscillatory patterns.
Conclusions:
- Oxygen uptake (VO2) exhibits oscillations during light exercise, linked to active muscle oxygen consumption.
- Impulse exercise potentiates these VO2 oscillations, influenced by both muscle oxygen utilization and O2 transport from muscles to lungs.
Related Concept Videos
01:24Pulse Oximetry
1.6K
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
1.6K
01:19Special considerations while measuring oxygen saturation
1.0K
Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
1.0K
01:17Pulmonary Cycle: Exhalation
5.0K
In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
5.0K
01:17Exercise 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...
Sustained exercise increases the muscles' oxygen demand, which can be...
3.8K
01:27Oxygen Transport in the Blood
7.8K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
7.8K
01:20Exercise and Cardiovascular Response
6.6K
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...
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...
6.6K