You might not like the answer

One question that nobody I teach tai chi to ever asks me, but I think they should, is “how much do I need to practice between classes?” Perhaps they don’t want to hear the answer!
The quick answer is: every day. If you’re serious about getting better at something you need to do it every day. I don’t mean just tai chi, it’s the same with anything you want to do in life. Want to learn to play the piano? Practice every day. Want to learn to speak Spanish? Practice every day.
Here’s what I observe about myself when I practice the tai chi form everyday: you go much deeper into your practice, because you’re not taking one step forward one step backwards anymore. You’re only going forward. Your tai chi form gets much, much sharper if you do it every day and you are able to get deeper into your practice. If you take a day off, it takes you a day to get back to where you were last time. There are things you notice about the movement, or about the way you do a movement that you only get the mental space to notice in your practice if it happens every day.
I’m not saying that if you miss one day everything will fall apart, but just try it –, make a conscious choice to practice the form every day for a week and see how it opens up your practice.
How long to practice
The next question is how much should you practice in a session?
The answer to this I like the best is, ‘do the form a minimum of 3 times’. Once because the first run through is always terrible. Second to work on something specific, and third to finish off just enjoying it and not working too hard.
If you have more time available you can do the form more times in the middle part of your practice to work on specific aspects. Or you could break out individual moves and work on them over and over. Some people really like this – I’m not such a fan because I don’t think any move in tai chi is especially better than any other, but that’s just me. Xing yi has a different approach because it emphasises the five ‘fists’, but that’s a different martial art.
Why the same form?
You might wonder if there is value in repeating the same form each day – I mean, why not do a different one each day, or freeform something? I think the answer is that you get something unique out of doing the same form each day that makes it worth it.
The idea of repeating a familiar sequence may not initially appear to be in keeping with ideas of spontaneity, but I think when you go deeper into a form, it can still feel spontaneous. Not to mention that once you go deeper into it and start living it from the inside you realise that a form is just a series of expressions (energy changes) and you can do those in multiple ways, so it is never the same form.
As Heraclitus famously said, or was reported to have said, “You cannot step into the same river twice”. However, I think you need to be very familiar with the river in question (the form) to appreciate that.

Graham,
You know how to shame a guy!
Have been struggling to up my Traditional Chinese Martial Arts training game and have been adding in x2 PT sessions a week plus one of Mobility & Recovery at my local gym, as Tai Chi alone is not cutting it for me.
Wrote about it here https://www.blackwatertaichi.com/blog/personal-fitness-goals
I am taking on your tip as an additional training goal and will do our short form three times a day.
Cheers,
Steffan
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I agree. I also practice every day and the more time passes the more I realize that in the repetitions the movements “reveal themselves”. I make a movement 100 times and on the hundredth I discover that it is better to make it in another way, sometimes it happens that I suddenly remind a comment made by my master and so I “feel the movement inside”. It is complicated to explain but it is beautiful to feel it.
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Thank you for pointing out how important being persistent is in practicing every martial art.
I do teach Tai Chi Chuan, and I do practice every single day, too. Excellence is an habit ….
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