7:51am PT by Lindsay Powers
'Dancing With the Stars:' Richard Simmons Not Sick
Fans were surprised to see Richard Simmons looking thin on Monday's Dancing With the Stars -- but his rep says there's nothing to be alarmed about.
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"He's the healthiest he's ever been," his rep, Tom Estey, tells People.com of the fitness guru, 63.
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"He's actually at the weight he was when we launched the original Sweatin' to the Oldies," Estey says, referring to the workout videos that made him famous in the '80s. "He is completely healthy, happy and fit as a fiddle."
"He's happy," Estey adds. "Everything with him could not be better."
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Simmons continues to teach dance classes at his Beverly Hills studio and campaign for his Fit Kids Act.
Simmons made a surprise appearance on Monday to coach Chaz Bono and Lacey Schwimmer through their Rocky-themed routine.