Beginning Jan. 4, the West Tisbury Library will offer four free Pilates classes on alternating Fridays from 4 to 5 p.m. The classes will be led by Judy Kranz, who teaches at the YMCA and The Field Club in Edgartown and has her own studio, Island Pilates, in Oak Bluffs.

Pre-registration is required as is a commitment to all four sessions: Jan. 4 and 18 and Feb. 1 and 15.

Sign up at the library or call 508-693-3366.