YOU SAID:

A man grows most tired while standing still.

INTO JAPANESE

男はまだ立っている間最も疲れている育ちます。

BACK INTO ENGLISH

Man is still standing among the most tired though.

INTO JAPANESE

男がまだ立っている間で最も疲れています。

BACK INTO ENGLISH

Man is still standing among the most tired.

INTO JAPANESE

男はまだ立っている間で最も疲れです。

BACK INTO ENGLISH

While he's still standing is the most tired.

INTO JAPANESE

彼はまだ立っている間は最も疲れています。

BACK INTO ENGLISH

While he is still standing is the most tired.

INTO JAPANESE

彼はまだ立っている間は最も疲れています。

BACK INTO ENGLISH

While he is still standing is the most tired.