however, age 16 is beyond my imagination

送交者: opentalk 于 2012-07-31, 00:23:51:

回答: doubt will always be there 由 kma 于 2012-07-30, 10:46:07:

unlike others, swimming demands a lot muscle powers. Age 20 is more reasonable age.

I could be totally wrong as I am not an expert. But too young and too big improvment...

hopefully it's true.