This article offers seven tips for improving your exercise habits and results. The tips are presented by Jordan Metzl, M.D., a sports medicine physician and fitness instructor. Dr. Metzl suggests setting goals that are a little outside your comfort zone to keep it challenging; increasing intensity of exercise to save time; and preventing injuries by knowing your body, including strength training in your routine, and making sure you find credible information about exercise and injuries. He also addresses fitness trackers.