VO2 max is a concept that you hear a lot about in professional sports. Television commentators in track and field and cycling often talk about an athlete's VO2 max and how it helps to crush the competition. But what is it? How does it work? And more important, how can you use it to help your running? Simply defined, VO2 max is the maximum amount of oxygen your body can consume during vigorous exercise. The higher your VO2 max, the harder buy nfl jerseys you can work out. It's a very good indicator of cardiovascular fitness, and it also helps predict your potential. Working out two to three times per week at 65% to 85% of your VO2 max can help you make gains in speed and muscular strength. You can perform a VO2 max test early nfl jerseys in training and then halfway through to measure your progress.