While you don’t need a new year or a new decade — or even a new day — to kickstart a fitness program, sometimes that turn of the clock or calendar is just the fresh start you need.READ MORE:Each day for 20 days, you’ll do 20 reps of two exercises. Even better, you’ll only have to keep track of 10 basic exercises — but this rotation of moves helps you target more body parts and muscle groups while giving others a break.story by ANTHONY J. YEUNG