In the video you see young Bulldogs Christian Howard, Jason Tutt, Mitch Wallis and Tom Liberatore take part in Maximal VO2 testing.
VO2 Max testing is the gold standard test in measuring aerobic capacity. A professional runner would need to have a VO2 in the mid to high seventies; however footballers are generally lower as they carry more muscle than a professional athlete.
The test gradually gets harder and harder and as you will see the boys literally run until they drop!
To see for yourself view the video clip above.
