I think he was right on about keeping a dark bedroom, but his ideas about exercise are off:
"Exercise is important too, although, says Lipman, this should be restorative rather than exhausting - he doesn't think we are built to run marathons or spend hours on treadmills.
Instead he promotes moderation, focusing on yoga and simple programmes designed to retrain our bodies to rest and recover..."
Not only are human bodies remarkably well-built for running, but it was key in our evolution. Yoga was not.
http://www.news.harvard.edu/gazette/daily/2004/11/17-running...