• method

    Sylvia’s intense, no-nonsense regimen continuously challenges clients while focusing on proper form and alignment. With widely varied exercises rather than a set routine, she ensures that her classes remain interesting and her clients motivated and engaged.

  • approach

    Sylvia’s approach to teaching is based on modern Pilates. Unlike classical Pilates, which adheres closely to the methodologies Joseph Pilates devised in the early 20th century, the BASI school of Pilates builds on top of his teachings, leveraging contemporary research in physical therapy and biomechanics.

instructors: katherine
Katherine C.
Katherine is a Los Angeles native who has earned her associate's certificate in Pilates through PhysicalMind in 2010, before taking a break to pursue a professional career as a dancer. After moving to New York, she realized her passion for teaching and became a certified Pilates instructor through Pilates Academy International. She is excited to be a part of the Pilates by Sylvia team and can't wait to help you achieve your goals!
instructors: sylvia
Sylvia Ostrowska
Sylvia has been practicing Pilates since 2007 and actively teaching it since 2012. A BASI-trained Pilates instructor, she has developed a dedicated following of clients who love the results they get from her classes: noticeable improvements to physique, endurance, strength, coordination, and flexibility.
instructors: corrina
Rachel C.
A native NYer, Rachel got her start in fitness as a professional swimmer and later through dance and musical theater. Certified through Pilates Academy International, she loves that pilates is for every body and is very excited to be a part of the PBS Team!
Sylvia is one of the most talented instructors I’ve had in any discipline. As delightful as she is knowledgeable, she has the unusual ability to make her class fun as well as rigorous. I’ve practiced Pilates with her three times a week for two years, and the classes never get dull or repetitive. Sylvia provides a thorough workout, which I’ve not encountered with other Pilates instructors, adapting to her clients’ needs while challenging and stretching them beyond their perceived limits.
Nancy C., NYC
Don’t have enough words to say about Sylvia! One of the BEST pilates instructors ever! Fantastic energy, spirit and driven attitude! Her knowledge about pilates, the mechanics of the human body, modifications and challenges are always on point! Her classes are always fun and challenging and I can’t get enough! Where she goes, I go!

Nipa P., NYC
Sylvia is simply amazing at what she does! She trained me throughout my entire pregnancy. I was concerned about safety during pregnancy workouts, but I also wanted a real workout (not just a stretch). Sylvia is so well-trained and knows technique so well that I felt safe in her hands. Not only did I receive compliments daily about how fit I was during pregnancy, but I bounced back to taking intense Pilates classes within two weeks of giving birth. Sylvia is nothing short of the best. If you are looking for an easy stretch class, she is not the instructor for you. But if you want a challenge and want to see your body in top form, you cannot find a better instructor!

Brigette R., NYC
Sylvia is my pilates guru. She challenges my comfort zone by pushing my body, my spirit, and my mind to exceed the limitations I think each are capable of achieving. She asks for trust in order to take risks that measure the progress I have gained through strength building and increased confidence. As a result, my body, my spirit, and my mind are continually learning, improving, and transforming. All the hard work and dedication definitely pays off! woo-wee!!!!

Lauren G., NYC
I have done Pilates at countless studios on three continents and I can say, without even a hint of hyperbole, that Sylvia is far and away the best instructor I've ever had. Her classes are consistently challenging (I often remark how she seems to have limitless unique ways to torture us! Haha) but it's her charisma and joy for teaching that really sets her apart. I often pick studios for their convenience. Now I travel out of my way because no one but Sylvia will do.

Tia L., NYC
Sylvia has been my Pilates instructor for the past 3 years. Her love of Pilates is apparent and contagious as it has become an addiction for most attending Sylvia classes. Our sessions are challenging and she always ensures we have proper form to avoid injuries. She motivates to push harder in class while treating us as individuals to achieve our optimal potential. I was an avid runner prior to Pilates and felt I was in pretty decent shape but after taking classes with Sylvia I am now in the best shape of my life. She ensures all of her classes not only target the core but all your major muscle groups. It is the best workout session and even though you are exhausted during the class she makes it enjoyable and fun at the same time. But you are always challenged and feel accomplished for the day. Sylvia's Pilate classes are addictive and my body and I thank her every day for how great I feel!

Kimberly S., NYC
$20/1 class
valid for 1 month
$45/3 classes
valid for 45 days
valid for 1 month
valid for 2 months
valid for 3 months
valid for 6 months
valid for 1 year
$70/1 session
valid for 1 month
valid for 1 month
valid for 3 months
valid for 6 months

Pricing reflects 55 minute class or private session in a studio

General Policy:

  • For safety reasons, we do not allow late entry (15 minutes or more) to our classes. No exceptions
  • All classes and sessions are by reservation only, and payment is due prior to the scheduled session or class. No walk-ins
  • New Client Specials are to be purchased only once by new clients
  • All classes and sessions begin and end on time. Classes and sessions are 55 minutes long
  • Group classes with only one participant will be shortened to 45 minutes
  • All classes and sessions have 24-hour cancellation policy. Any cancellation within the 24-hour window will be charged for the class or session
  • All Private Sessions and Duets are currently scheduled by email
  • We will extend packages for another month only with a purchase of a new package (5-pack, 10-pack, or a 20-pack)
  • People who have never done Pilates Reformer class before, are NOT allowed to attend the intermediate and advanced classes. Qualification for the intermediate and advanced classes is done by our teachers individually
  • People with injuries can not attend the advanced classes
  • No pregnant people in classes. Prenatal classes or Private Sessions are recommended
  • No bare feet please. Socks are required
  • No use of cell phones. Please turn off the cell phones before entering the studio
  • No gum chewing please
  • Please refrain from wearing heavy perfumes, colognes, and other scents
  • Pilates By Sylvia reserves the right to turn away clients who do not comply with our policy and refund their purchases
  • Pilates By Sylvia reserves the right to substitute instructors if necessary
  • Please do not unsubscribe from reminders and notifications if you use the waitlist, so that you could be notified when your turn comes up
  • No multiple accounts. All multiple accounts will be deactivated


  • We accept credit cards and cash
  • All packages are non-refundable, non-transferable, and all have expiration dates
Fastest way to contact us:
Slower way to contact us:
(347) 450-7455


39 W 32nd St #903a,
New York, NY 10001
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Bryant Park

16 W 37th St FL 3,
New York, NY 10018
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