Originally Posted by
Enthalpic
There is almost no evidence that nasal dilators improve performance, but I don't doubt they improve breathing comfort for some.
No difference from a fully plugged nose (clipped) and an expanded nose, heck the expanded nose was non-significantly worse (C is plugged, A is nasal dilator).
https://www.ncbi.nlm.nih.gov/pubmed/10949017
"There were no significant differences in VO2max (mean +/- SD; C = 3.12+/-1.1; P = 3.12 + 1.06; A = 3.04+/-0.94)."
That's not bad for meds.
That all may be true, but it is definitely nice just to be able to breathe through my nose during hard efforts and not feel congested.