Breathe out and feel the path of relaxation as it travels down your back and into the earth. I have experienced a tightening of my lower back when stepping during the Tai Chi form. I have also witnessed some experienced Tai Chi players locking their lower backs as well. Next time as you breathe out try to follow the path of relaxation as it goes down your back and into your feet.
I made my first conscious effort to practice the Tai Chi form without thinking “no mind“. In the past, I have always practiced keeping in mind-body mechanics, breath, alignment, the next posture, etc. If my practice remains in this way my form will always be controlled from my mind. I need to learn to practice where my mind is in my center and trust that my body knows what to do. My center is two inches below my navel, this area is called the Dantian.
Although I practiced my form very slowly today it seemed like time flew by, my form was effortless.