It's not all about busting your a** in the gym on the weights, treadmill and cross trainer. The Rock has diversified himself in his physical regime as much, or arguably more than he has in his acting. As well as being an utter beast in the gym, Rock has also reached expert levels in American Football and professional wrestling while reaching near perfection in a number of mixed martial arts and boxing. All of which benefit his body in different ways. So take a leaf from Rocky's book and spread your proverbial wings. Every form of exercise you try is going to benefit you and your physique at the end of the day. It's exercise.