Dallas Morning News (blog)Fitness tip of the day: Jumping jacks! | | Dallas Morning NewsDallas Morning News (blog)I start my morning with 150 jumping jacks. At day's end, if my Fitbit lets me know I'm a few steps short of my goal, I've been known to make up for 'em with more jumping jacks. I love these gym-class standbys. They get my heart pumping; they provide ...