My just turned 13 years old son is a good sportsperson, plays cricket and football at quite a high level. He was at some sort of athletics thing for school today and did 100m in 13 point something seconds (he's good at sports not remembering things so we don't know what the last bit of the time was) I dont know anything about athletics but is that considered a good time for a 14 year old boy? It seems quite good to me but then maybe those last few seconds are really hard to loose?