The cooler temperatures of late summer bring new opportunities and new challenges for expanding our fitness programs. The 5 to 10 mile bike ride that seemed so easy suddenly becomes an endurance trek when riding into the wind. Meanwhile, cooler weather energizes your runs, pushing you further. Soon children and many young adults will be returning to school and our professional lives shift into high gear. It's a good time to let that excitement extend into our personal lives and workout regimens.