With the fridge finally free of holiday leftovers, most Americans make the dreaded resolution to shed the pesky pounds they inevitably gained over the last few months. Vowing to be in beter shape than the year before, U.S. adults swear their fitness oaths loud and clear at local gyms. But how many actually stick to this popular resolution? Read on to find out how Americans plan to keep their bellies firm and their resolutions in tact.