It’s hard to motivate yourself to work out—especially in the dead of winter. If you need a healthy dose of #fitspo, look no further than stars like Karlie Kloss and Gigi Hadid, who frequently take to Instagram to document their respective exercise regimens—most of which are available to the public. Ahead of your New Year’s resolutions, consider switching up your regular routine with any of the classes listed below. You might bump into a familiar face or two.
VIDEO: Fitness Trainers Reveal What They Never Eat Before and After a Workout