CV Acute
Number of times heart beats per minute
Definition of Heart Rate
What is ventilation?
Describes the total volume of air breathed in or out per minute and is calculated by multiplying respiratory rate by tidal volume
Widen blood vessels to skin and constrict blood vessels elsewhere
Process of vasodilation/vasoconstriction
Difference in HR
Lower heart rate for trained individual
Oxygen deficit
Oxygen supply does not meed oxygen demand
Amount of blood pumped out of left ventricle per beat
Definition of Stroke Volume
What is diffusion?
Oxygen and carbon dioxide being exchanged.
When we get hot, what happens to our blood flow?
Increases to skin, decreases to muscles
Impact of stroke volume
Trained individuals have a higher stroke volume, so they can pump more blood per beat allowing their heart rate to be lower, keeping their cardiac output the same with less effort.
Steady State
oxygen supply meets oxygen demand
HR x SV = Q
Equation for Cardiac Output
What is tidal volume?
Volume of air inhaled or exhaled per breath
When we sweat, what happens to blood plasma? What is the impact on blood distribution
Blood plasma decreases, making blood thicker, making it harder to move around the body.
larger lung volumes and stronger respiratory muscles
When does steady state occur
During submaximal exercise
What happens to stroke volume as exercise intensity increases?
Increases until reach a point where it plateaus
When we exercise what happens to gaseous exchange?
Increases to get more oxygen in and more carbon dioxide out
When we get too hot, what happens to our HR?
Increases in an effort to account for the blood flow to skin so we can continue to exercise and get blood flow to muscles
Who has higher av02 difference - trained vs untrained?
Trained
EPOC?
Excess post oxygen consumption
What happens to blood pressure when we exercise?
Systolic pressure increases
Number of breaths taken per minute
Respiratory rate
When we sweat, what should we do to recover?
HYDRATE!!!
4 aerobic activities someone can engage in
running, cycling, swimming, rowing.
a-v02 difference - what is it? What happens when we exercise?
difference in oyxgen between arteries and veins. When we exercise this difference increases as we extract oxygen for our muscles