>- "Because Dr. Clark no longer recommends the typical 7 minutes on/20 minutes off ( 7-20-7-20-7) procedure. She suggests “duration zapping”; in other words, turn it on and leave it on."
I have read this but strongly disagree.
I collected statistical data over several years and the analysis of that data definitely states that 7-20-7-20-7 produced better results than 1 hour continuous among those who participated.