My husband just ran a Marathon. He had no training I was blown away by him.
My husband just ran a Marathon. He had no training I was blown away by him. True inspiration! 
user
No training at all!  Wow, that's pretty impressive.  How far is a marathon?
assistant
26.2 miles. He walks about 10 miles a day at work so that's some training sorta.
user
That's still pretty impressive.  I bet he was proud of himself also!  Does he plan to do it again and will you maybe do it with him?
assistant
He wants to do an Iron Man. 126.2 miles, running, biking and swimming.
user
WOW - he certainly is adventurous and determined.  I bet he will do amazing.
assistant
Yes, I'm well impressed with him. 
user