Yes, you should be in your usual state of health when doing the spirometry testing because it is either establishing a baseline or monitoring for changes.
It is highly doubtful that the effects will be permanent, because the trainer is just compressing the water out of fat tissue, and displacing your internal organs.
It's confirmation bias: if you're on the lookout for negative results, when you see them, you'll think that you only receive negative results. But negative results are only part of...
Vaping affects your body similar to the way cigarettes do. It contains nicotine which is addictive. It can affect many of your body processes and can lead to respiratory-related illnesses.
Just sit with your feelings for a while and see if they are consistent. Pay attention to your friend, and try to assess if she would be open to such...
They can cause a lot of discomfort, especially if you get a pair that doesn't fit your arch. Let's say that someone flat-footed buys a pair of boots with a...