2. Complete a 500-meter row in 90 seconds
This workout will end just in 1 and a half minutes, but maintaining stamina for the entirety of this time will prove very difficult for most people. This exercise needs you to push outbursts of energy relentlessly, which would be impossible without a strong lung. Soldiers of the Special Forces and UFC fighters can sustain this type of exercise. So if you can pull it off, it would mean that your strength is on par with them.