Frequently Asked Questions

Do I need to register online for class?

No, online registration is required for workshops and special events, but for all regularly scheduled classes, just come to the studio.  If you do opt to sign up online, please note that this does not guarantee your spot in class — we still ask you to come on time for class (there is no late admittance to class permitted).  For more online registration FAQS, click here.

Can I borrow a yoga mat?

Yes. We have mats for you to use. You can borrow one for free on your first visit and we ask a $1 donation after that (and we in turn donate that money to the Maple Farm Animal Sanctuary).

I tried calling over and over but no one answers the phone. Are you open?

Yes we are! Our studios open 30 minutes before any class begins. The phone, which is in the office in our Cambridge location only (Somerville does not have a phone) goes to voicemail when no one is in the office. You can leave your questions about either studio on the voicemail or email (; email is typically answered significantly faster.

I have a question or want to buy something. Why is the door locked?

Our desk is staffed 30 minutes before regularly scheduled classes. Check the class schedule and stop by before a class to make any purchases.  In Cambridge, the front door will be unlocked during regular cafe hours — cafe staff can assist you with retail purchases but NOT yoga class purchases/gift cards, so please plan accordingly.

Can I use my class card or membership at both studios?

Absolutely. Come to whatever class fits your schedule. Just check in at the reception desk.

Can I let my friend take a class using my class card?

No. Your class package is restricted to your account profile with us and can’t be shared.

Can I sign my friend up online for a workshop or class?

You each need to register for a workshop or class as individuals, so your friend would need to have his or her own online account and purchase his or her own workshop or class package.

You have student rates, but why can’t I buy a class card at the student rate online?

Because we need to see your ID to confirm you’re a student, we have to restrict the sale of the student rate packages to the front desk. There’s no way for us to manage that via the web, so the student rate isn’t available online.

What’s the parking situation?

There’s street parking at both locations. In Somerville, there’s free 2-hour parking on Highland Ave. In Cambridge, there’s 2-hour meters out front on Mass Ave – as well as lots and garages 5 or so blocks away in Central Square.  Please allow for extra time if you’re planning on driving to an evening class in Cambridge since both Harvard Square and Central Square are quite busy then and parking can be trickier.

Do you do Hot Yoga? How hot is your studio?

We think of ourselves as a ‘warm’ studio. We keep the rooms at around 80 degrees: warm enough that you won’t feel a chill but not so hot that you’re baking (most ‘hot’ studios will heat the room to ~100 degrees). We do a vigorous practice at O2, so you will sweat, but we want most of that heat to come from the work you’re doing, not from an outside source. Some of our classes, like prenatal and postnatal, are kept a little cooler as appropriate for the students.

I’m not very flexible. Should I start stretching before taking a yoga class?

No. Getting more flexible is a good reason to start practicing yoga. You may find it frustrating at first, but you will be amazed by how quickly you gain flexibility. In fact, many teachers could not touch their toes when they started practicing!

Increasing your flexibility will help you with other sports – biking, hiking, and running, for example – as well as everyday activities, like getting out of a car and reaching that top shelf of your cupboard. You will feel great!

My doctor told me I should start doing yoga. Is this the right kind of yoga for me?

It depends. Here at O2 Yoga, we practice a vigorous form of yoga. Many people find that with minor, or even chronic, injuries that they understand well, this form of yoga helps them to heal and to feel better. However, if you have a severe injury, you may want to try a slower or gentler form of yoga, such as Kripalu.

I’m new to O2 — where should I begin?  Can I skip right to a Power class?

We recommend that all students try a Basics class on their first visit to O2, regardless of their experience level.  Our Basics classes are designed to be a solid examination of fundamentals of the style of yoga we offer here.  That said, you are welcome to attend any class you like — there’s no “test” to move on to a more advanced class.  But you WILL get more out of your practice if you’re familiar with Sun A’s (vinyasas) and other foundational poses before attending Intermediate and beyond.

It is best not to come to a Primary Series class unless you have taken a Power class or have previously practiced the Astanga Primary Series. Our Primary Series classes are fast-moving with less instruction than other classes; the teacher assumes that students have familiarity with the sequence and postures.  Second Series is recommended only for advanced practitioners.

My new yoga mat is so slippery — WHY?

Almost all mats are slippery when you first use them. After you have used your mat a few times, it should feel less slippery. Try walking on it with your bare feet at home. You can also machine wash it and let it drip dry. If none of these tips help, you may have bought a cheap mat. Try buying a mat from the studio or ordering one online from Jade Harmony (this is the type of mat we carry in-studio) or Manduka, two well-reputed yoga products stores.

How often should I practice yoga?

As often as feels right for your body. The more often you practice, the quicker you will notice progress in your practice. However, if you are just starting out, two to three times a week will help you become familiar with the postures and the pace of the practice. Once you have been coming to class for a few months, you may want to increase your practice to four to six times a week.

What’s your return/exchange policy with class packages? Can I give my classes to a friend?

All sales are final on class cards.  Your classes are only useable by you. Your classes expire after one year.  Click here for all the specifics.

I can’t figure out the deal with the MP3 downloads.  How do they work?

First, you must purchase an MP3 and then the links will become active.  Be aware that the first one you click will be the one you buy.  For other FAQs about the MP3s, click here.

Can I bring my child with me to class?

Our classes are designed for adults (+18) unless otherwise specified.  Anyone under the age of 18 who is interested in taking an O2 Yoga class must have consent from a parent and approval from the teacher/management before being allowed to participate in class.  Please email with questions about that.

What is Astanga?

Aṣtanga Yoga is the form of yoga that underlies everything we practice at O2. In aṣtanga classes, students practice a set sequence in the same order every class (and there are several sequences of increasing difficulty).  This allows the student to focus, over time, on building a consistent practice, on keeping the breath steady, and on taking ownership of the practice and knowing when to modify. Because the sequence of the series remains consistent, these classes move at a faster pace and feature less detailed cuing (the classes are less taught and more led). In our O2 Yoga Basics, Intermediate, and Power classes, in comparison, sequencing is improvisational – built around an anatomical focus or  pose – and more time is spent breaking down postures and offering alternatives.

Aṣtanga classes are not recommended for students new to yoga or without  experience with sun salutations, lotus/padmasana, backbends, and inversions like shoulderstand and headstand.

You will see the foundational aspects of aṣtanga – gaze point/driṣti, locks/bandhas, and breath/pranayama – in all O2 classes. You’ll also recognize other ideas essential to aṣtanga informing everything we do: flowing vinyasa transitions between poses; pose followed by counterpose; intelligent sequencing toward deeper poses; the importance of generating internal heat; a narrative of warm up, progression into deeper poses, ending with cool down; and a focus on strength and balance as much as flexibility.

O2 does not offer ‘Mysore’ style self-led aṣtanga classes. It’s been our experience that students benefit most from the experience of the full sequence, even when modifying. The community of an aṣtanga led class working together is powerful. We also ask that students working on advanced sequences practice with the led class.

What is a Rajas Hour?

Rajas Hours are Intermediate-level O2-style classes that are one hour in length.  The emphasis in this class is dynamic movement (versus seated postures).

Google says you’re closed — are you?

Google says we’re closed unless there is a class currently in progress.  If you’re curious about any potential class cancellations, please check the online class schedule as it will always be your best resource for any class changes.

Wait, I still have questions!

The fastest way to have your questions answered is either to ask teachers/management/desk staff in person when you come to class or to email  We do have a phone in the Cambridge office, but email is still your best bet.