Kinesiology_Final_Prep - Kinesiology Final Prep...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Kinesiology Final Prep Cardiovascular System Q = HR x SV (Cardiac Output = Heart Rate x Stroke Volume) - Stroke Volume: Is the amount of blood that is ejected by the ventricles. Is expressed in mL/beat (1000 mL = 1 Liter). At Rest - Non-Athlete: 5 Liters/min = 80 Beats/min x 62 mL/Beat - Endurance Athlete: 5 Liters/min = 80 Beats/min x 100 mL/Beat - Endurance athletes have thicker ventricular walls which tell us that there is a big cardiac adjustment to exercise. - The resting heart for an endurance athlete is lower than it is for a non-athlete. At Max - Non-Athlete: 16-18 Liters/min = 200 Beats/min x 75-90 mL/Beat - Endurance Athlete: 30-40 Liters/min = 200 Beats/min x 150+ mL/Beat - During max exercise, a non-athlete can go up to 16-18 Liters/min in cardiac output. Trained athletes can get their stroke volume up really high, and thus increasing their cardiac output. - For the same amount of work, the heart rate of the trained athlete will be lower than that of the non-athlete. - For the same amount of work, the trained athlete will have a higher stroke volume. - For the same workload, the cardiac output between the trained and non-trained athletes will be the same. The trained athletes cardiac output will only go higher after a certain point. Arterio-Venous Oxygen Difference vs. Cardiac Output - As the Arterio-Venous Oxygen difference decreases, Cardiac Output increases.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
- A cardiac patient is able to extract more oxygen and their Arterio-Venous Oxygen difference is higher as a result. This makes up of their low Cardiac Output. Blood Pressure Pressure = Flow x Resistance - In a closed system, pressure is a product of flow and resistance. - Flow: Is represented by Cardiac Output. - Resistance: Is represented by the viscosity of the blood and the diameter of the blood vessel. - The diameter of the blood vessels (resistance) is the cause of high blood pressure. This can be caused by an increase in epinephrine. - High blood pressure is the cause of many heart diseases. - Lowest Blood Pressure: In the Supine Position (lying down). - Highest Blood Pressure: When a person is Standing Up. This is because the pressure has to counteract the force of gravity to pump blood back up. - From Supine to Standing: Mainly Systolic Blood Pressure will increase. If there is a decrease, it may indicate Orthostatic Hypotension. A person with Orthostatic Hypotension becomes lightheaded because there is a decrease in blood flow to the brain. - During weight training, Blood Pressure increases as the resistance from the contraction of the vessels increases. - The Valsalva Maneuver: Lifting a weight to a certain point, taking a deep breath and holding it in, and then completing the lift. This makes it easier to lift the weight, but it also increases Blood Pressure very high. Systolic Blood Pressure
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 21

Kinesiology_Final_Prep - Kinesiology Final Prep...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online