Muscles must be kept in top condition to hold up bulky sweaters and to adapt to gravity’s yo-yo diets. Keep yourself in shape for any circumstance with today's Groupon: for $30, you get two months of Ladies' Thai Cardio and Pilates Classes at 8 Limb Muay Thai (an $80 value).

8 Limb Muay Thai club leads female exercisers through the art of Muay Thai–enhanced cardio in two-hour weekly classes. Certified personal trainer, amateur fighter, and Kru-certified Catherine MacLean leads ladies through cardio exercises focused on Muay Thai's punches and kicks using hands, feet, knees, elbows, and well-timed eyebrow furrows. Femme fatales alternate combat-adapted exercises with floor-bound Pilates sets aimed at toning core muscles. Kru Catherine molds class content to accommodate exercisers of all experience levels, aiding ladies in increasing agility, flexibility, strength, and ability to punch perfect circles through notebook paper. Classes require no additional equipment or fees, other than participants’ own bodies. Club facilities challenge athletes to bouts and to sophisticated philosophical debates in two square boxing rings and on a panoply of exercise equipment ranging from punching bags to skipping ropes.