Before each semester, I would like to ask students to choose any tea wares and make the same tea the way they want. It's obvious, the tea's flavor differs brewed by different people, and most of them couldn't sit well. When they move the tea wares or get the kettle, or pour out the tea, they would bend their body unconsciously.
Tea art practice is a life-long journey, and a heart-cultivated journey too. If you have a similar problem, as you can see from the aboved video, this is the right way to practice it, to make sure you can sit straight while brewing tea.