Walking, jogging and cross-country skiing in deep water. This class improves cardiovascular fitness and muscle tone. Class Times × You must be a Y member to register for this program. If already a member, please login. Great South Bay YMCA: Nov. 23 - Jan. 30 (9:15AM-10:00AM) Tuesdays Tuesday, 9:15AM - 10:00AM, Jan. 26, 2021 Online registration Ages 16 - 99