Student Information

Whether you’re prepping for your first class with us or your nine thousandth, we’ve got some information here that we hope you’ll find helpful.


All regularly-scheduled classes at O2 are on a drop-in basis.  Each student attending must have classes under his or her name — if you are planning to come to class with a friend, he or she will need to have an account.  You are not able to share classes you’ve purchased with someone else.

Please consult the Cambridge or Somerville schedule for information on class times and durations.  All of our classes are heated (year-round) to about 80-degrees and are athletic in nature, taught progressively with offers of modifications for students working with minor injuries or pregnancy.  Please make the teacher aware of any limitations to your practice.

What the class levels mean:


The focus in Basics is on O2 Yoga Foundations, breaking down the principles of safety and alignment fundamental to standard and recurring postures. These classes are appropriate for those new to yoga, new to the studio, or students wishing to refresh and reconnect to their practice.  Class offerings vary in length from 60 minutes to 75 minutes.


Rajas Hour is designed for the experienced beginner and beyond. Expect to break a sweat as you work towards challenging postures with focus on standing asana, strength, and heat-building. Rajas is sanskrit for change, motion, action, transformation, and creation. This class is not appropriate for beginners.  Classes are 60 minutes.


Building off the foundations taught in Basics, our Intermediate level classes are focused on more advanced poses, arm balances, and inversions with the goal of building the strength, flexibility, and focus required for O2 Power classes.  This class is not appropriate for beginners.  Class offerings vary in length from 60 minutes to 75 minutes.


This is the advanced level of O2 Yoga. The instructor leads the class through a flowing and varied sequence of postures including arm balances, backbends and inversions. Playful and expanding, this class is intended to challenge the more experienced student.  This class is not appropriate for beginners.  Classes are 90 minutes.


The Astanga Yoga system is the foundation for the O2 Yoga practice. An Astanga class will include predictable sequencing (meaning it will be the same every time), focused on flow (vinyasa), and working toward full expression of postures with proper execution of breath and timing.  While modifications are offered, this class is not appropriate for beginners.  Classes are 90 minutes.


Second Series builds on the sequence found in Primary Series.  It is our most advanced class offering.  Second Series replaces Primary Series for the last Astanga offering of the month.  While modifications are offered, this class is not appropriate for beginners.  Classes are 90 minutes.


Karma Classes typically appear on our schedule in the winter months and feature our recent Teacher Training graduates.  These 60-minute Intermediate-level classes are half-price ($8) and we donate 100% percent of the profits to Maple Farm Animal Sanctuary.  More details can be found here.

What to Wear

Wear light, comfortable clothing for practice. Avoid bulky or loose clothing. You may want to bring a sweatshirt or long-sleeve shirt to wear at the end of class as you are cooling down. This style of yoga is practiced barefoot.

What to bring

This style of yoga is vigorous. You will most likely work up a sweat during class so you may want to bring a towel. If you own a yoga mat, please bring it to class. If you don’t have a mat, we have some available at the studio for rental ($1); yoga mat rental is free for first-time students.  We also sell Jade yoga mats at both studio locations.  You may want to bring a water bottle for after class. Filtered water for refill is available at the studio.

Studio Recommendations and Policies

Avoid eating a heavy meal two to three hours before class; avoid eating a light meal one to two hours before class. Drink plenty of water before class.

The desk is staffed 30 minutes before the start of any class.  Plan to arrive at least 10-15 minutes before class to give you enough time to feel settled in. Classes begin promptly. We do not allow late arrival for class.

After your first visit the studio, you will simply need to give your name at the desk — there is no “Member ID Card” or anything extra for you to carry around.

You are not required to sign up online for class, but if you do, please still check in at the sign in desk.

If you are coming to class with a friend and you want to sign up ahead of time, each of your will have to enroll since classes are restricted to the single user’s account.  This applies to workshops, too, unless otherwise noted.

You can pay for class by cash, credit card (MasterCard, Visa, American Express, and Discover) or check.  All class package sales are final.

If you are a student, please bring your student ID to get the student rate.

Restrooms and changing rooms are available for use at the studio.  We do not have showers.

Let the teacher know if you are new to yoga or if you are working with any minor injuries or conditions. If you have a serious injury or condition, please check with your physician before beginning a yoga program.

The studio is not responsible for personal items.  Please store your belongings in a safe space during class.  Our Somerville studio has cubbies directly in the classroom space. Our Cambridge studio has cubbies just outside the classroom space as well as lockers by the upstairs bathrooms that you may store valuable items in during class.  Please bring your own lock.  There is no long-term storage available at either studio, other than Member Mat storage.  Please ask a staff member for more information.

Our teachers are more than happy to chat with you about the O2-style, specific poses, and other such goodness — we are all certified Yoga Nerds around here!


For a list of other FAQs, click here.

We love our O2 Yogis!  See you for class soon!