Is it possible to improve THAT fast?

I believe it's possible. He seems to have been quite fit beforehand. He has bicycled with the likes of Lance Armstrong. There's a kid on my team who started swimming at age 16 coming up on two years ago now. He's probably 18 now and he is the fastest guy on the Senior team (which he has been so for about seven months, I'd say). My team isn't a slow one, either. And what did he do right before swimming? Track, cross country. :) As compared to someone like myself, who did practically everything (especially if it was individual) when I was 7-13 years old, and then high school came when I buried my nose in books and writing and let the internet consume me, and I completely dropped any semblance of physical activity altogether until I was 20 years old. I have had and still have a lot of debts to pay off. But "a Lannister always pays his debts." Gold star for whoever gets the reference!

I believe it's possible. He seems to have been quite fit beforehand. He has bicycled with the likes of Lance Armstrong. There's a kid on my team who started swimming at age 16 coming up on two years ago now. He's probably 18 now and he is the fastest guy on the Senior team (which he has been so for about seven months, I'd say). My team isn't a slow one, either. And what did he do right before swimming? Track, cross country. :) As compared to someone like myself, who did practically everything (especially if it was individual) when I was 7-13 years old, and then high school came when I buried my nose in books and writing and let the internet consume me, and I completely dropped any semblance of physical activity altogether until I was 20 years old. I have had and still have a lot of debts to pay off. But "a Lannister always pays his debts." Gold star for whoever gets the reference!