MARCH 11

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: 718-287-3400

Shape 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: 212-927-1563

MARCH 12

Flawless Fitness with Kymberly Nolden: High-impact class set to Beyonce. 6:15-7:30 p.m., FREE. Athleta, 1517 Third Ave. Info: 212-249-2072

FIT+LOVE Bootcamp: High-intensity bootcamp class with trainer Zach Schares. 7:30-9:30 p.m., FREE. Athleta, 126 Fifth Ave. Info: 212-929-0512

MARCH 13

Run/Yoga with Brittany Ignas: Mix of cardio and strength. Participants get an Athleta goodie bag. 6-7 a.m., FREE. FastBreak Sports, 1629 First Ave. Info: 212-724-3278

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

MARCH 14

Shape Up NYC -- Zumba: Aerobic, dance-based workout that sculpts and tones the body. 9-10 a.m., FREE. Poe Park Visitor Center, 2640 Grand Concourse, Bronx. Info: 718-365-5516

Yoga in the Elements: Yoga instructor Mike Mancini leads this session under the sun. Bring your own mat. 9:15-10:15 a.m., $16, $10 members. Alley Pond Environmental Center, 228-06 Northern Blvd., Douglaston. Info and registration: Alleypond.com/adults.html

Muscle and Flow Yoga with Shauna: Part power, part vinyasa, set to a hip-hop and R&B soundtrack. 10-11 a.m., $30. Refinery Hotel, 63 W. 38th St. Info and registration: Wellthilyevents.com

Girls Prep Ultimate Pi Day 5K: Raising money to support STEM initiatives at Girls Prep schools. In partnership with NYC Runs. 9:25:53 a.m., followed by kids' race at 10:30 a.m. $25 for 5K, $5 for kids' race. Info and registration: publicprep.org/ultimatepiday

Shape Up NYC -- Kick, Box and Chill: Cardio kickboxing class combining cardiovascular and strength-building exercises. 2-3 p.m., FREE. Hudson Guild, 441 W. 26th St. Info: 212-924-6710

MARCH 15

Well+Good Sweat Series -- Yoga and Chocolate with David Romanelli: Vinyasa flow yoga class followed by a tasting of Vosges Haut Chocolat's new dark chocolate collection. Arrive early to guarantee admission. 8:30-11 a.m., FREE. Athleta, 126 Fifth Ave. Info: 212-929-0512

Yoga with Regenerate Fitness NYC UES: Learn a step-by-step flow to avoid pain during yoga. 10-11 a.m., FREE. Athleta, 1517 Third Ave. Info: 212-249-2072

PROnatal Fitness Class with Brittany Citron: Prenatal fitness class based on the latest medical research. 8:30-10 a.m., FREE. Athleta, 216 Columbus Ave. Info and registration: Pronatalfitness.com

MARCH 16

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/events

Shape Up NYC -- High Intensity Interval Training: Build strength and improve balance. 6:30-7:30 p.m., FREE. Hudson Guild, 441 W. 26th St. Info: 212-924-6710

MARCH 17

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: 718-365-5516

Meet-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

Natalie Uhling Fitness: Cardio workout with Under Armour trainer Natalie Uhling. 7-8 p.m., $30. Refinery Hotel, 63 W. 38th St. Info and registration: Wellthilyevents.com

Matcha Meditation: An urban retreat featuring matcha and guided meditation. 7-8 p.m., $20. The Shinnyo Center for Meditation and Well-being, 19 W. 36th St. Info and registration: Shinnyocenternyc.org/workshops