The Deluxe and DVC resorts have gyms. Actually, I found this tidbit on allearsnet.com in reference to the health clubs: "Guests of other Disney resorts may do so for $12 per day, based on availability". The closest one to All Stars would be Animal Kingdom Lodge.
http://allearsnet.com/acc/faq_gen.htm#6
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]
Which resorts have health clubs? [/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Animal Kingdom Lodge[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Boardwalk Inn and Villas[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Contemporary[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Coronado Springs[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Grand Floridian[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Old Key West[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Saratoga Springs [/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Wilderness Lodge Villas[/SIZE][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-1]Yacht and Beach Club[/SIZE][/FONT]