If you've been wanting a new haircut but don't want to do anything too crazy, the '70s bangs trend is a great option. Your bangs will be long enough to pin back with a bobby pin or headband for exercising, and because they are swept to the sides, they won't be constantly getting in your eyes. Also called curtain bangs, they frame anyone's face perfectly and are easy to style with a flat iron or large curling iron for a gentle, loose wave.
Plus, you can cut them yourself pretty easily! Just be sure to start with trimming a very small amount of hair in front so they don't turn out too heavy. You can always cut more if you feel like it's not enough around your face. And start out a little longer than you think you need to just in case!