Richard Simmons is up in heaven with his trademark tank top and shorts, working up a sweat ... at least that's what his brother said at Richard's celebration of life.
The late fitness guru was remembered Saturday in his hometown of New Orleans, Louisiana ... and his brother, Leonard, compared him to Clark Kent during a touching eulogy at St. Louis Cathedral.
SWEATING WITH THE HOLIES
Leonard says Richard was like Superman in that he always had his tank top and shorts on under his outfit -- like Clark keeping his superhero getup under his civilian clothes.