Pilates strengthens core muscles of the abdomen, back, and pelvis, making it an ideal exercise for women who are pregnant or have recently given birth. Juliana Secches, a dancer from Brazil, currently teaches Vinyasa classes, as well as prenatal, Mom and Baby, Kids yoga, and Samba Yoga. She has teaching certifications from Be Yoga, Karma Kids Yoga, and Baby Om.  102 West 14th Street, 2nd floor. Expires December 1, 2012. www.sambayoga.com