Respiratory muscle strength

Respiratory muscles are those which are used for breathing, such as the diaphragm. There are three different tests involved in assessing respiratory muscle strength.

The first is very simple and requires you to breathe normally in and out through the mouthpiece. The mouthpiece will then block randomly for a very short duration, approximately 0.1 seconds. This will be performed at least ten times while you breathe normally.

The second test assesses your inspiratory muscle strength. We will ask you to breathe out as far as you can and then try to breathe in against a blocked tube as hard as you can for at least 2 seconds. This will then be repeated at least 3 times.

The last test assesses your expiratory muscle strength. We will ask you to breathe in as far as you can and then try to blow out against a blocked tube as hard as you can for at least 2 seconds. This will then be repeated at least 3 times.

This test normally takes between 10-20 minutes to complete.

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