capacity Understand the effects of exercise and training on breathing, capacity and volume
Starter Count how many breathes you take in 1 minute
Respiratory Rate The number of breaths you take in one minute
=
Tidal Volume The volume of air you breathe in (or out) with each
breathe
=
Minute Volume The volume of air you breathe in per minute Minute Volume= tidal volume x respiratory rate
=
What happens when you exercise? All 3 increase Typical 18 Year old
Tidal Volume (Litres)
0.5
2.5
Respiratory Rate (Breaths/min)
12
30
Minute Volume (Litres/min)
6
75
Vital Capacity The maximum amount of air you can breathe out after
breathing in as deeply as you can =
Residual Volume The amount of air left in your lungs after you breathe
out as hard as you can. Usually around 1.5 litres – you can never empty your lungs completely
Lung volumes Diagram handout
Effects of training Breathing muscles grow stronger which allows deeper
breathes – vital capacity increases More alveoli become surrounded with capillaries so gas exchange is more efficient Aerobic / stamina work can continue longer
Lungs and exercise 1. During exercise cell respiration in your muscles increases, so the level of CO2 rises
2. Your brain detects this, it sends a signal to your lungs to breathe faster and deeper
3. Gas exchange in your lungs speeds up. More CO2 passes out of the blood and more O2 passes in 4. The brain also sends a signal to your heart to beat faster so – More blood gets pumped to the lungs for gaseous exchange More blood gets pumped to the muscles, carrying O2 and removing CO2
Starter. Count how many breathes you take in 1 minute ... During exercise cell respiration in your muscles increases ... More blood gets pumped to the lungs for ...
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