[chrisseaton]

Fifty push-ups in one go with excellent form is the base level of fitness in the British Army (probably similar in most other armies). A hundred in one go is a reasonable for many people to reach. Many very fit people count as obese, especially those with the muscles to do push-ups. The Serjeant Major of the British Army said in a TV interview that he was 'obese'.

[abdullahkhalids]

The percentile graph of max number of pushups is not a linear function. Its entirely possible for a large section of population to reach 50, the same way its possible for a large section of the population to hit the 20 second 100 m, but for almost no one to hit the 10 second 100 m.