2. Swimming
This is indeed the most complete exercise of them all. Every single muscular group is used in this sport, which helps burn calories at a rate of almost 116 for every 10 minutes at the pool. There are a couple of caveats here, though: One, you do need to master at least one style (usually freestyle) in order to know how to manage your body properly once into the water and two, obviously, you need a pool. Other than that, swimming can be an enormously pleasurable cardio exercise, which will not only allow you to get rid of some extra calories, but it will also add flexibility to your body, improve your respiratory system and help you release stress.