The Gerrity Fitness and Sports Center is open 4:30 a.m. to 1 a.m. weekdays, 9 a.m. to 9 p.m. Saturdays, 9 a.m. to 6 p.m. Sundays and 10 a.m. to 6 p.m. holidays. Bldg. 3705 Fitness Center hours are 5:30 a.m. to 6 p.m. weekdays. Tinker Fitness Center, Bldg. 216, is open 5:30 a.m. to 8 p.m. weekdays.