You won’t find dumbbells or fancy machines at Sean Keogh’s gym in Houston. At Calisthenics Club Houston, it’s all about the body — literally. “That’s all we do,” Keogh says. Yet, it’s more than enough ...

If you need to build strength as you prepare for military training, you should add weightlifting, load-bearing exercises, weight-vest calisthenics and other resistance workouts to your routine.