Why not everyday? Because yoga is not my life, you say? Oh. Okay then. The answer varies.
When I first practiced yoga, it was very sporadic. Probably not even once a week. Are there any benefits to practicing once in awhile? Yes. Most people feel good during or after yoga, if not both. This goodness can help a person decide to do more yoga. Long term benefits to sporadic practice? Probably not.
Some types of yoga, like ashtanga, require practice at least four days a week, beginners included. But if you are totally new to yoga, your ashtanga practice will only be about 20 minutes long. Practicing sporadically will only frustrate you. In fact, any highly vigorous (or heated) yoga done sporadically is going to leave you sore (or nauseous) and wondering if it’s right for you.
If you are still at the dappling stage, I recommend a basics class in a gentler style. You can find this in classes called or studios that offer, for example, Integral Yoga, Kripalu Yoga, Sivananda Yoga, Iyengar Yoga, Gentle Yoga, Hatha Yoga, and Viniyoga. There’s less chance of strain or injury, and it will give you the taste and foundation you need to do more. It is an untruth that yoga is for flexible people. It increases strength and flexibility, but that’s not the point.
An aside: when you meet a yoga teacher in a non-yogic situation, please do not announce your inflexibility to him. I mean, think about that for a moment. Really. (Up next, an essay about what not to say to yoga teachers in social settings.)
Okay, then once a week. But keep with a basic style, or Iyengar. I have students who practice only once a week, and while there is some minor progress in their asana, they are almost starting from square one each week. Twice a week is better. I do see marked improvements in my undergrads, who meet twice as week over a semester. Also, they are spring chickens and their bodies are quick to learn. My older students, even mid-20s, make less progress at that frequency.
To see real, long term benefits of yoga, I find you need to practice 3 times a week, minimum. It’s difficult to meet your body and notice what is going on if you practice less often. Practice does not have to be a 90-minute class. It can be 15 minutes of practice at home or in an office. A few sequences are posted here. These are meant to supplement classes, not replace your teacher. Yoga is best learned directly from a teacher, not videos, books, blogs, or podcasts. They can help supplement your practice until you’re ready to practice on your own without them (which is about now, at the intermediate level). If you practice three times a week, you will start to notice a difference in your body, your yoga, and hopefully your mind. And get over headstand. It doesn’t matter.
You practice 5-7 days a week. No less. Please understand that advanced yoga is not back flips or contortions. It could be 60 minutes of ardha padmasana. This frequency is open to any level, though beginners should be cautioned against an over-zealousness that leads to burnout. If you practice this often, you will progress. You will also suffer ego trips and spiritual materialism, but that’s part of the practice. Notice and cut it out. No one’s style of yoga is the best style of yoga, and because you’ve dedicated over ten hours a week to your mat doesn’t mean you’re a better yogi than someone who’s never seen a mat. Nor are you superior because you don’t go in for an impressive asana practice but sure like to meditate.
Committing to something like an ashtanga practice is a major time commitment, but with that practice “all is coming,” as K. Patabhi Jois liked to say. The one thing that truly amazes me about ashtanga is what dedication and commitment can bring. This is true of any practice. Have fun.