Lectures

Cardiovascular Response and CO Changes in Endurance Training – CV Response to Exercise

by Thad Wilson, PhD
(1)

Questions about the lecture
My Notes
  • Required.
Save Cancel
    Learning Material 2
    • PDF
      Slides CVresponse VascularPhysiology.pdf
    • PDF
      Download Lecture Overview
    Report mistake
    Transcript
    Now let's switch gears and talk about endurance exercise because you don't just do anaerobic exercise, you don't just do isotonic exercise but you do aerobic exercise which may involve walking or running or cross-country skiing. Here you have an increase in total body oxygen consumption, there are increases in cardiac output which involve both increases in heart rate and stroke volume. There are large redistributions of organ blood flow to the working muscle. There are also increases in mean arterial pressure, although it's primarily systolic blood pressure because there is little to no change in diastolic. So let's go through these one by one and tease out why we're getting the effects that we are. This is a nice diagram to look at changes in heart rate in response to resting conditions, to aerobic workload such as walking or running and then maximal. You can see there's a nice linear relationship between heart rate and workload, meaning the harder you work the higher your heart rate. Now stroke volume is similar to a point. During resting conditions all the way up to moderate work, you have a linear increase in stroke volume but as you get towards maximal exercise it flattens out some and the reason why there are probably two, one is heart rate is so high during maximal conditions that the blood does not have enough time to fully fill the heart before it contracts again. So you have a limitation in your ability to increase stroke volume. It goes up to a point and then levels off. There is a blood flow redistribution that occurs and this blood flow involves everything from the heart to the skin, to the GI tract and all of these will change at different levels of work. If we want to...

    About the Lecture

    The lecture Cardiovascular Response and CO Changes in Endurance Training – CV Response to Exercise by Thad Wilson, PhD is from the course Vascular Physiology.


    Included Quiz Questions

    1. Increase in cardiac muscle blood flow
    2. Increase in skin blood flow
    3. Increase in cerebral blood flow
    4. Increase in gastrointestinal blood flow
    1. Brain
    2. Gastrointestinal system
    3. Lungs
    4. Skin
    5. Heart

    Author of lecture Cardiovascular Response and CO Changes in Endurance Training – CV Response to Exercise

     Thad Wilson, PhD

    Thad Wilson, PhD


    Customer reviews

    (1)
    5,0 of 5 stars
    5 Stars
    5
    4 Stars
    0
    3 Stars
    0
    2 Stars
    0
    1  Star
    0