How important is it to push for reps during a football game?
So why test for that?
As mentioned already, as for why that exact figure, human beings have a fondness for numbers that are round in some way, tending strongly to employ such numbers in favor of those that are not.
For example, how many drugs come in 11 mg tablets, vs those that are 10 mg?
How many guys want to do 9 week steroid cycles, versus 8 or 10?
How often do people say they're aiming to gain or lose 19 lb compared to how often you hear this for 20 lb?
225 in weightlifting is a round number on account of what weights are standard for plates and bars.