Richard Simmons -- Down and Dirty PLANKING

7/11/2011 7:13 AM PDT BY TMZ STAFF
Fitness guru Richard Simmons clearly doesn't waste his life on the Internet -- because this weekend, the 62-year-old planked for the FIRST TIME EVER in his entire life ... on a filthy L.A. sidewalk.

He might want to wash his hands.

UPDATE:  Richard later took his planking to the next level. Checkout this pic one of his students tweeted.