Cooper Test - This tests your aerobic endurance and provides an estimate of your VO2 max. You run as far as you can in 12 minutes then calculate your V02 max estimate using the following formula:
VO2 Max = (Distance covered in metres - 504.9) ÷ 44.73
Or using the calculator on the webpage here: https://www.brianmac.co.uk/gentest.htm