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!