Below you can find the This physical & mental exercise system was popularized in the u.s. by lilias folan through her pbs series that began airing in 1972 Jeopardy Words Answer. The answer to This physical & mental exercise system was popularized in the u.s. by lilias folan through her pbs series that began airing in 1972 has 4 letters. This clue belongs to the Speaking hindi category and is part of Jeopardy Word Level 571. If you scroll near the bottom you will find other clues and answers part of level 571