When you fajing do you truly connect to the ground and let it does its job?
Or do you use leg muscle to push against the ground to generate the power?
Below is a video showing how we train to connect to the ground without having to straighten the back leg to thrust against the ground to generate power.
Our rationale for this is that when you push your leg against the ground you are trying to use a stronger strength against a weaker strength. This does not fit the profile of Tai Chi as an art of using the soft to overcome hard.
Our reading of the principles of the Tai Chi Classics require us to let the opponent apply pressure on us so that we can borrow his power.
We then allow his power to connect to the ground at which point Newton’s 3rd Law of Motion comes into play, causing the opponent’s power to rebound back at him.
To allow this to happen we must relax so that the rebound force can move through our body swiftly with minimal impediment and maximum flow.
In this way when the force comes out it will be strong like a geyser discharging water forcefully into the air.