person A: I took up running and I started seeing a huge improvement in my cardiovascular endurance.
person B: Nice_comma_ Was it hard to start?
person A: Unimaginably hard. But once I got into it I couldn't stop. I'm feeling pretty certain that I'll hit my 5km goal in no time.
person B: Wish i could run close to 5km_comma_ i'd struggle with 100 meters.
person A: I used to be that guy too. If I can do it_comma_ you can do it.