Even if your goal -- a marathon, let's say -- may center on cardio, you must observe strength or resistance coaching, too. robust muscles burn additional calories, facilitate stop injuries, and build stronger bones. Work muscles on weight machines, with hand-held instrumentation like free weights, kettlebells, or resistance bands, or by doing exercises like push-ups. Rest every muscle cluster, akin to striated muscle and striated muscle, a minimum of a pair of days between strength workouts.