It gave me "the coach is fit". As far as I'm concerned this pretty much means "the coach is sexy/hot" in colloquial UK English.
Well, outside of British slang, it's short for physical fitness. An aesthetic physique is, of course, a likely side effect of good physical fitness.
Yes, you are right 'k-ON-dition' is pronounced like English 'on' (short å-vowel), the computervoice is wrong in pronouncing it like Swedish 'ko'' (cow), which is a long slow 'O-sound'
I agree with stamina. The suggested answers 'The trainer is in good shape' and 'The coach is fit' are in my view translations of 'Tränaren är i (bra) form'.
Nowadays Swedish has become so mixed up with English that it is hard to feel the difference. But still, we used to say "Jag/Han/Hon har bra kondition". And for me "är i bra kondition" sounds more like a machine being in "a good condition".
Not only is it a correct translation. It is a much better one. You don't necessarily have to be fit to have stamina and to some extent vice versa.