Yoga Teachers and Organizations: Yoga Alliance, RYT Standards, IAYT and What Certification Means

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The new teacher at the gym’s Thursday class introduces herself with a string of letters: “E-RYT 500, C-IAYT.” A runner in the back row with a cranky hip wonders what any of that means, and whether it matters. It does, a little. NCCIH, the US government’s center for complementary health research, says practicing under a qualified instructor lowers your risk of injury, and in a large survey of yoga practitioners, people who practiced only by self-study had more problems. But yoga teacher certification isn’t like a medical license, and the letters tell you about training hours, not about how good a teacher is with athletes. Here’s what they mean.

Who’s who in yoga

Yoga Alliance	A US-based nonprofit membership organization that keeps a voluntary registry of yoga teachers (RYT) and schools (RYS) that meet its standards. It does not license teachers; your certificate comes from your training school.
Registered Yoga School (RYS)	A teacher training program registered with Yoga Alliance at the 200, 300 or 500-hour level, or for children’s (RCYS) or prenatal (RPYS) yoga.
IAYT	The International Association of Yoga Therapists, founded in 1989. It accredits yoga therapy training programs and certifies yoga therapists (C-IAYT).
Studios and gyms	Set their own hiring rules; ask your studio what training its teachers have.
The United Nations	Proclaimed June 21 the International Day of Yoga (resolution 69/131, December 2014).

Yoga Alliance and what “RYT” means

Yoga Alliance is a membership organization, and its teacher registry is not a certification program or a license. When a teacher says they’re “Yoga Alliance certified,” what they usually mean is that they completed a training at a Registered Yoga School and registered as a Registered Yoga Teacher (RYT). Members sign an ethical commitment, complete continuing education and pay annual dues; the 2025 standards list a $50 application fee and $65 yearly dues.

Here are the six teacher credentials in Yoga Alliance’s 2025 standards:

Credential	Training	Teaching experience required
RYT 200	A single 200-hour training at an RYS 200 (shorter trainings can’t be combined)	None
RYT 500	A 500-hour training, or a 200-hour plus a 300-hour advanced training	At least 100 hours after training
E-RYT 200	A 200-hour training	At least 1,000 hours over at least 2 years
E-RYT 500	A 500-hour training (or 200 + 300)	2,000 hours over at least 4 years
RCYT (children’s)	RYT plus a 95-hour children’s yoga training	30 hours teaching children
RPYT (prenatal)	RYT plus an 85-hour prenatal yoga training	30 hours teaching prenatal yoga

An E-RYT 500 can lead teacher trainings and continuing education workshops. Experienced teachers who didn’t train at a registered school can apply through an Experienced Teacher Pathway, which asks for at least 500 hours of training, 10 years of teaching and 3,000 teaching hours.

What’s in a 200-hour training

Under the standards for new 200-hour schools, which took effect in 2020, the curriculum has four categories: Techniques, Training and Practice (75 hours), Anatomy and Physiology (30), Yoga Humanities, formerly yoga philosophy, lifestyle and ethics (30), and Professional Essentials, which merges teaching methodology and practice teaching (50). The lead trainers must hold the E-RYT 500 credential and teach at least 150 of the 200 hours. Trainings can be in person, online or both, but at least 15% of the hours must be live (synchronous).

So a new RYT 200 has about 30 hours of anatomy and physiology. That’s a useful foundation, not sports medicine training. A teacher with years of experience, extra training in anatomy, or a background in physical therapy or athletic training may understand an athlete’s injuries better than the letters alone suggest.

What registration doesn’t tell you

The registry tells you about training hours. It doesn’t measure how well someone teaches, and it isn’t a background check. Yoga Alliance has faced public criticism that its systems for keeping harmful teachers and schools off the registry were weak, and it says it added tools in 2022 to monitor training quality and member conduct. Treat the credential as a starting point and judge the teacher in the room.

IAYT and yoga therapists

Yoga therapy is different from a regular class: a yoga therapist works with one person, or a small group, on specific health goals, usually alongside their medical care. The International Association of Yoga Therapists (IAYT) was founded in 1989 and, by its own count, has more than 5,000 individual members in 50+ countries and nearly 70 accredited yoga therapy training programs. Graduates of an accredited program can apply for the C-IAYT credential, and C-IAYTs agree to follow a defined scope of practice and code of ethics. Accredited programs must be at least 800 hours, far more than a 200-hour teacher training.

A yoga therapist is not a replacement for a doctor, physical therapist or athletic trainer. If you’re injured, get a diagnosis first. Then a C-IAYT, or a physical therapist who uses yoga, can be a good partner for the long road back, working with your medical team rather than instead of it.

How athletes can choose a yoga teacher

• Ask about training and experience. An RYT 200 is the common baseline. For athletes with injury history, look for more: an RYT 500, an E-RYT, a C-IAYT, or a teacher who is also a physical therapist or athletic trainer.
• Ask if they’ve worked with athletes. A teacher who knows what a pitcher’s shoulder or a runner’s hamstrings go through will choose poses and cues differently.
• Watch how they handle injuries. A good teacher asks before class, offers modifications and props, and never pushes you past pain. NCCIH advises beginners to avoid extreme practices such as headstands, shoulder stands, the lotus position and forceful breathing.
• For kids, look for an RCYT or a teacher with real experience teaching children. More on our yoga for kids and teen athletes page.
• Look for props in the room. Blocks, straps and bolsters are a good sign that the teacher expects to adapt poses to bodies, not the other way around.
• Use the directories. Yoga Alliance and IAYT both have searchable directories of registered teachers, schools and accredited programs.

Props teachers use with athletes

Most good teachers keep a stack of props by the door, and owning a couple makes home practice match what you learn in class. A strap like the Manduka Align (about $22, 1.75 in × 8 ft, cotton webbing with a metal buckle) lets tight hamstrings and shoulders reach a stretch without rounding the back. A firm block like the Manduka recycled foam block (about $26, 9 × 6 × 4 in) brings the floor up to your hand in triangle and half-moon. The Liforme Classic mat (about $165) has printed alignment markings that some teachers like for cueing hand and foot position. More choices, including budget options, are on our yoga gear page.

Check the Manduka Align Yoga Strap price on Amazon

Back to the yoga for athletes hub, or see yoga styles and etiquette, yoga injuries and yoga training. For how a team sport’s organizations fit together, see our soccer leagues and associations page.

Yoga teacher certification questions

Is Yoga Alliance a certification?

No. Yoga Alliance is a voluntary registry and membership organization. Your certificate comes from the school where you trained; registering with Yoga Alliance as an RYT shows that the training met its standards.

What does RYT 200 mean?

RYT 200 means the teacher completed a single 200-hour training at a Yoga Alliance Registered Yoga School and registered with Yoga Alliance. No teaching experience is required for that credential.

What is the difference between RYT and E-RYT?

E-RYT means “Experienced.” An E-RYT 200 has at least 1,000 teaching hours over at least two years after training; an E-RYT 500 has 2,000 teaching hours over at least four years and can lead teacher trainings.

What is a C-IAYT yoga therapist?

A C-IAYT has completed a yoga therapy program accredited by the International Association of Yoga Therapists (at least 800 hours) and agrees to follow IAYT’s scope of practice and code of ethics. Yoga therapists usually work one-on-one on specific health goals, alongside medical care.

Do you need a license to teach yoga?

Yoga Alliance registration is voluntary, and it isn’t a government license. Studios, gyms and schools set their own hiring requirements. Check local rules if you plan to teach as a business.

Does a yoga teacher need to know about sports injuries?

It helps a lot. A 200-hour training includes about 30 hours of anatomy and physiology, which is a foundation, not medical training. Athletes with injuries should get a diagnosis from a sports medicine doctor or physical therapist and share any limits with their teacher.