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Preliminary PDHPE. Core 2. Dot Point 8

A year 11 assessment task about the immediate responses to training.
by

Sam Freshwater

on 4 May 2011

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Transcript of Preliminary PDHPE. Core 2. Dot Point 8

Immediate Physiological Responses
To Training
Core 2- The Body In Motion
-Before, during and after exercise.
- Changes occur to give the body oxygen and nutrients.
Heart Rate
Ventilation Rate
Stroke Volume
Cardiac Output
Lactate Levels
These responses are specific
but neccesary
Activity :)
Increase? OR Decrease?
What could happen?
These Responses are Crucial
Heart Rate
Increase in oxygen Before we start
Body begins to adapt to increased demand of exercise during the steady state.
During steady state heart rate varies dependant on intensity.
The average heart rate is 72bpm where as champion endurance athletes have been know to have heart rate between 27-28 beats per minute at rest.
Stroke Volume
How much oxygenated blood is pumped from the heart in one minute.
Average= 60ml-80ml
Athlete= 160ml
oxygen pumped more frequently
Moves to the muscles with a demand for oxygen
As exercise
begins to slow
stroke volume
returns to its normal
rate
Ventilation Rate
The amount of air taken into the lungs per minute
TWO FACTORS
Depth of breath
Frequency of breathes
Rest=12 Breathes/min=500ml of air
Ventilation Response
Change breathing to supply sufficient oxygen
After exercise breathing
remains rapid for a short
amount of time.
Cardiac Output
Heart Rate x Stroke Volume= Cardiac Ouput
60x100=6000
Demands means that the bodies blood must be redirected to active muscles
At rest muscles recieve 20%
During exercise muscles recieve 84%
Trained and untrained
= 5litres/min
Lactate Levels
Chemical formed during
breakdown of carbohydrates
Small amount circulating through the body
As intensity rises so does the
concentration of lactic acid.
For each lactate that is formed a hydrogen ion is also formed.
Ph drops below 7 making it harder for us to perform activities.
Lactate Infection Point
Examine the reasons for changing patterns of respiration and heart rate during and after submaximal physical activity
Un-modifiable
Modifiable
untrained VS trained
When inceased demand is put on the
body sudden changes occur to survive.
Also flucutions depending on intensity
eg. Jogging to Sprinting
Conclusion
Heart Rate
Stroke
Volume
Ventilation Rate
Cardiac Output= SVxHR
Lactate Levels
Immediate Physiological Responses
Changes within the body
Ensure enough oxygen/nutrients supplied
Meet the demands of exercise
Thankyou
Full transcript