Casa Madeleine (Calle del Espíritu Santo #69, tel. 7832-9348, www.casamadeleine.com [1]) offers complete spa packages along with its swanky boutique accommodations. Services include massage, reflexology, aromatherapy, mud therapy, pedicures, manicures, and deep facial treatments.
Skin Deep (1a Avenida Sur #15, tel. 7832-7182, 8 a.m.–8 p.m. daily) is a well-run day spa and salon housed in the same building as Café Sky offering the usual assortment of spa services in a pleasing environment.
There are quality yoga classes by trained U.S. instructors available in Antigua [2]. YogAntigua (tel. 5251-4809, lizzieyogini [at] gmail [dot] com) offers classes every morning inside Galería Panza Verde (5a Avenida Sur # 19) and afternoons at Antigua Center (7a Calle Poniente #11, Mon. and Thurs. at 5 p.m.). Vinyasa and Hatha yoga and classes start at $6 for drop-in or $50 for a 10-class pass.
Links:
[1] http://www.casamadeleine.com
[2] http://www.moon.com/destinations/guatemala/antigua