AC A does mention "exercise regularly again", so I believe by including the word "again" that gives us enough reason to assume that he exercised regularly before he injured his knee. Because it's not possible for somebody to do something again, if they never did it before.

It's really subtle which is why I missed this under timed conditions too

the idea of one idiot injuring himself on a trampoline 83,400 times in one year absolutely sent me 😂

just happened for me too

Thank you!