A human body consistently needs ample amount of oxygen to regulate its biological processes. There are certain kinds of exercises which liberate needful quantity of oxygen to keep the body fit and fine. Cardio exercise is one of them and renders proper content life-saving gas to the heart to keep it breathing for last longing period. one of the most desired cardio instruments. You can take the aid of treadmill to run, jog or walk. Best fitness equipment for sweating out unwanted calories.