Lack of Speed
Mechanism / Why It Happens
Once your body loses its upward momentum, no matter how hard you press the tail down, your body cannot move into the stall position.
You are pressing your back foot hard against the coping, but you still cannot get your body above it. This is like a pole vaulter standing still, planting the pole forcefully into the ground, and wondering why they cannot take off. Your body needs energy in order to rise. Even if you press the tail against the coping, when your body has too little energy, it will begin descending before it can rise.
What to Do
The role of the back foot is to act as a pivot that supports your body weight as your body rises.
More than anything, you need sufficient speed. Only when you have enough speed and your body carries
