Lots of barrettes, in my case. It is not an especially attractive look. But I am of an age to be pretty business-minded about exercise, as are most of the other people in my gym, nobody is very concerned about their physical appeal. I had a vague idea of getting some kind of hair band. But I haven't found anything that looks like it won't either shift around or be too heavy/sweaty -- I sweat a lot when I do any kind of cardio.
I use two kind of flat barrettes that I can usually only find in CVS/Walgreens or sometimes Walmart, they're just very simple flat metal bent into barrette shape. You could use hairpins too, but I have very fine hair that tends to break with hairpins. Just looked on the package: I use two kinds, these packages happen to be from Goody -- one is called "Alice barrettes
" and the other is called "Breanna snap clips
". (BTW the description on the Walmart page for the Alice barrettes is hilariously purple prose, some advertising copy writer was REALLY bored that day.)
I deal with it mostly in the cut, I ask my stylist to cut it chin-length in the front and pretty short on the back of my neck (no bangs). When it becomes long enough to stick back there I know it's time to visit her.
I am interested to see what people have come up with. Pictures would be great!