This is the 12579th most frequent Swedish word.
smärtgräns
The Swedish word "smärtgräns" means "pain threshold" in English.
In this sentence, 'smärtgräns' is used to describe the physical endurance limit or pain threshold of a person during a strenuous activity.
Han når sin smärtgräns när han springer för långt.
He reaches his pain threshold when he runs too far.
Here, 'smärtgräns' is a general concept used to describe the natural variance in sensitivity or tolerance to pain among individuals.
Smärtgränsen varierar från person till person.
The pain threshold varies from person to person.
In this case, 'smärtgräns' refers to the point at which pain sensations would be intensely felt, which is managed using medication.