‎ 09/11/2025 (Thu) 10:35 No.9031 del

>Your lungs hold secrets about your health as you age – here's a simple test to check them

<1. First, measure out 200ml (7fl oz) of water into a measuring jug, transfer to the plastic bottle and use a pen to mark the water level.
<2. Add another 200ml of water, mark the new water level and repeat the process until the bottle is full.
<3. Fill the bucket or bathtub with water and dip the now full bottle into it, turning the bottle upside down under the water.
<4. Keeping the bottle in this position, place the rubber tubing inside the bottle neck. It doesn't have to fit tightly.
<5. Take a deep breath and blow into the tube.
<6. Count how many lines of water you can blow out of the bottle.
<7. Multiply the number of lines by 200ml. (eg three lines is 600ml). This number is your vital lung capacity, also referred to as forced vital capacity or FVC.

https://www.bbc.co.uk/future/article/20250908-the-simple-test-to-check-how-old-your-lungs-are