43 years old. 6'2, 225. Started F1 15 months ago training each element once per week. Only recently started dabbling in stretch series but honestly do have difficulty completing all of the stretch workouts due to a busy job. My elevated deck squat started at 8 inches. Is there anything I can do to speed up my progress. My inability to move to a normal deck squat does not allow me to progress in many of the movement elements.