Stretch those muscles and sweat it out with Today’s GroupOn. For just $49, get any five group fitness classes at PNT Fitness in Long Island City (a $100 value). You can choose between cycling, cardio and core-strengthening classes suited to all fitness levels. There is absolutely no problem if it’s your first time working out. All you have to do is choose what suits you. PNT Fitness classes are great to help get those muscles motivated to new levels of endurance. Get your muscles toned with kickboxing sessions while learning about self-defense. You can opt for the cycling courses as well if you’re more at ease with the pedals. Rid of those unwanted inches on your abdomen with high-intensity workouts in the Cycle Quickie classes that knocks off 300 calories. Sculpt your rear domain with the 30-minute Butts ‘n’ Guts sessions. GroupOn buyers must make reservations ahead and ensure their spot together with the 51% discount.