I have tried earbuds for running, but they always fall out of my weird shaped ears.
That’s where the Mee M6 Sports win, they come with triple-flange eartips, which fit into the ear canal, and don’t dislodge easily, in fact you’re more likely to rip the cable off than pull them out of your ears!
As I’ve found, catching the cable on a door handle; I came to a very abrupt stop!
The Shure’s come with triple-flange eartips, and Mee Electronics sell their eartips as kits, or as sets of large or small triple-flange, which will fit earphones with large diameter acoustic tubes, and Shure sell Triple-flange tips which fit small diameter acoustic tubes. Really worth investing in, they make a huge difference in both comfort, and particularly the sound quality. They seal the ear canal, cutting background noise drastically, and improve bass response.
The only better mod is a pair of custom-fit silicon eartips, but those’ll cost £112, against about a tenner or so.