Siri Chilazi

Siri Chilazi is an ACE and AFAA-certified group fitness professional and international fitness presenter with nearly 20 years of teaching experience and a background in ballet, jazz, modern, and Latin dance. She is a Master Trainer for Human Reformer Pilates (mat Pilates using resistance bands to mimic a reformer), the Mobility Fitness Academy (functional mobility/joint mobility), Cardio Yoga®, and RAQ THE BARRE® (a format combining barre fitness with belly dance technique). Siri regularly presents at industry-leading fitness conferences—teaching and certifying other instructors—including IDEA World, SCW MANIA, FitnessFest, and World Barre Summit. In 2023, Siri was named the IDEA Emerging Trailblazer of the Year. She teaches weekly in-person classes at three gyms at Harvard University (in Boston/Cambridge, MA, where she is based) in formats ranging from Pilates and Barre to Step, Strength, and HIIT. Since 2009, she has traveled to 29 resorts (and counting) to teach with Fit Bodies. Siri's passion is to inspire and help people lead their healthiest, most fabulous lives, and her classes are always accessible to people of all backgrounds, bodies, and fitness levels. She actively shares fitness inspiration and education on Instagram (https://www.instagram.com/sirichilazi/).

In addition to her fitness career, Siri has a second career as an academic behavioral scientist, gender equality researcher, author, and keynote speaker (and she regularly shares related insights on LinkedIn: https://www.linkedin.com/in/sirichilazi/). She is a senior researcher of gender equality in organizations at Harvard Kennedy School and the coauthor, with Iris Bohnet, of the acclaimed book, Make Work Fair: Data-Driven Design for Real Results (HarperCollins, 2025). She conducts 50+ speaking engagements annually to audiences of up to 3,000. She has a Bachelor of Arts degree in Chemistry and Physics from Harvard University, as well as an MBA from Harvard Business School and an MPP (Master in Public Policy) from Harvard Kennedy School. 

Siri loves to travel and meet new people all over the world, and she speaks five languages (English, Spanish, French, Swedish, and Finnish). Her favorite things besides fitness and traveling are cooking and baking, running, and doing crossword puzzles with her husband.