CRUX = a puzzling or difficult problem, of Latin origin meaning an instrument of torture
The CRUX for new runners = consistency, patience, fear, pain, being out of breath, uncertainty, distance, self-confidence, habit, technique, stress
What happens when new runners fail to get through the CRUX?
They give up on a new healthy habit, let go of their dream of having a certain body composition, and walk away from an incredibly portable, stress-reducing, and effective form of exercise.
Get through the CRUX and your life will change for the better. Get stuck at the CRUX and you'll write a chapter you don't want in your life. A weak mind will get stuck at the CRUX, while a strong mind will power through it.