Losing benefits if you skip a day

I've been doing yoga and now I've become bored with it and decided to go back and try to do the Five Tibetans again. However, one thing that discouraged me when I read the book is that Keldar says you must do the exercises everyday and that if you skip more than one day in a row you lose ALL the benefits y0ou ever gained! Has anyone who has been doing them regularly ever skipped more than one day in a row? If you did, did you think you had to start again at ground zero?