YOU SAID:
just keep feet on ground
INTO JAPANESE
足を床につけたままにしておいてください
BACK INTO ENGLISH
Please leave your feet on the floor
INTO JAPANESE
床に足を置いてください
BACK INTO ENGLISH
place your feet on the floor
INTO JAPANESE
足を床にしっかりとつける
BACK INTO ENGLISH
Place your feet firmly on the floor
INTO JAPANESE
足を床にしっかりとつける
BACK INTO ENGLISH
Place your feet firmly on the floor
You've done this before, haven't you.