TODAY

Shape Up NYC -- Glutes in Gear: Build endurance through cardio, then work your abs and glutes. 6-7 p.m., FREE.

Prospect Park Audubon Center, Lincoln Road/Ocean Avenue entrance. Info: 718-287-3400Shape Up NYC -- Bollywood Cardio Dance: This Bolly X class is a high-intensity cardio dance workout. 6:30-7:30 p.m., FREE. J. Hood Wright Recreation Center, J. Hood Wright Park, 351 Fort Washington Ave. Info: 212-927-1563TOMORROW

Tai Chi Class for Adults: Learn the correct Tai Chi walk, movement and breathing techniques. 11:30 a.m.-12:30 p.m., FREE. Poe Park Visitor Center, 2640 Grand Concourse, Bronx. Info: 718-365-5516BFX Burn with Amanda Butler: Develop your core, build lean muscle and improve your strength. 7:30-9:30 p.m., FREE. Athleta, 126 Fifth Ave. Info: 212-929-0512Lunch Time Yoga with Brittany Ignas: Open-level Vinyasa class. Noon-1 p.m., FREE. Athleta, 1517 Third Ave. Info: 212-249-2072"Healthy Latin Eating" Cookbook Signing: With Angie Martinez and chef Angelo Sosa. 6 p.m., FREE. Barnes & Noble Tribeca, 97 Warren St. Info: 212-587-5389FRIDAY

Shape Up NYC -- Cardio Toning: Work your core through strength, balance and toning exercises. Noon-1 p.m., FREE. Prospect Park Audubon Center, Lincoln Road/Ocean Avenue entrance. Info: 718-287-3400SATURDAY

Shape Up NYC -- Zumba: Aerobic, dance-based workout. 9-10 a.m., FREE. Poe Park Visitor Center, 2640 Grand Concourse, Bronx. Info: 718-365-5516National Girls and Women in Sports Day: People are all ages and genders are welcome, with instruction in sports like volleyball and soccer for the kids and fitness classes for the adults.

11 a.m.-3 p.m., FREE. Chelsea Recreation Center, 430 W. 25th St. Info and RSVP: 212-408-0243MODS Pilates Mat with Studio Anya: Dynamic meditation-style boot camp. Mats will be provided. 8-10 a.m., FREE. Athleta, 126 Fifth Ave. Info: 212-929-0512Change of Heart Event: In this special donation-based barre class, a portion of the proceeds benefit the American Heart Association. 12:15 p.m., $33. Barre3, 63 W. Eighth St., 2nd Fl. Info and registration: Barre3.comSUNDAY

Well + Good Sweat Series -- Stoked 360 with Kira Stokes: Cardio and strength training. Arrive early to guarantee admission. 8:30-11 a.m., FREE. Athleta,

126 Fifth Ave. Info: 212-929-0512MONDAY

Shake Out Mondays Run: Start the week with a 3-4 mile run led by Belly's Running World. 6:30 p.m., FREE. Lolë Atelier, 112 Mercer St. Info and RSVP: Facebook.com/ lolenewyork/eventsTUESDAY

Meditation and Hatha Yoga: Focus on your breathing, sound and mindfulness. 1-1:45 p.m., FREE. Poe Park Visitor Center, 2640 Grand Concourse, Bronx. Info: 718-365-5516Meet-up with Studio Anya: A class in mind and body fitness. 6:30-7:30 p.m., FREE. Lolë Atelier, 112 Mercer St. Info and RSVP: Facebook.com/lolenewyork/events