I am obviously one of the rare ones but I enjoy cardio... I do 90 minutes of cardio 6 days a week and 75 of those 90 is on the treadmill but I just turn on whatever sports are on the tv and run... HIIT training, like the layout EZ gave you is excellent... swimming is extremely difficult but can be fun at the same time and is EXTREMELY EFFECTIVE... your mind is what will ultimately determine what you can and can't do... you will be amazed at your capabilities... adding gw-501516 not only enhances your cardio like nothing you can imagine but it just makes it enjoyable because you really see what your capable of... there's no better feeling than when you complete a long cardio session... you feel so accomplished and just have an overall sense of tremendous well being and health...