Sex can be considered working out . At least I consider it working out. A good 30 minute session can burn up to 200-300 calories even more if you know how to get crazy! Having sex can increase your heart rate and use various muscles in your body. Sex won’t replace going to the gym but having some crazy sex a couple times a week can really help you get some extra physical activity. So go and grab your significant other and go get down to it!