The most recent celebrity sweatfest is the Soap Star Workout, produced by Richard Klinger, who brought us the Jane Fonda Workout series, and featuring the likes of Jacklyn Zeman and Kin Shriner of General Hospital, Charles Shaughnessy of Days Of Our Lives and Holly Gagnier and first-timer John Martin of One Life To Live.

Jane Fonda: Still leading the pack with eight tapes to her credit, including her current hot seller, Jane Fonda's Complete Workout (Lorimar).

Let's not forget . . . Vanna White's Get Slim and Stay Slim (Warner), Debbie Reynolds' Do It Debbie's Way (VidAmerica), Marie Osmond's Exercises For Mothers To Be (MGM/UA) and Lindsay Wagner's Psychocalisthenics (Cinergy).