The word "strain" can mean two things: the act of putting stress or pressure on something or someone, or the result of that stress or pressure, which can cause damage or tension. Full definition
The same applies to the human gut - A healthy microbiome contains hundreds to thousands of strains of probiotic bacteria, all with unique and varied functions. (essentialformulas.com)
«All of this is putting a lot of strain on families,» he said. (christianitytoday.com)
This kind of damage is usually the result of an excess amount of strain in a high pressure area. (thedressedaesthetic.com)