Ferris said he found that eating within one hour (ideally 30 minutes) of waking up increases fat-loss. Binging on junk food one day a week helps lose weight by keeping your metabolic rate up. Drinking ice water on an empty stomach, a cold shower and keeping an ice pack on the back of your neck can increase fat burning up to 300 percent.
He said he started tracking his own physical performance when he was 18 years old.
"My goal is to train people to be intelligent self-experimenters so they don't have to wait 10 to 20 years for some government conclusion that is probably going to be inaccurate," he said. "Rather, they can simply remove one thing from their diet or add one thing to their diet, and discover in a matter of weeks what would have taken them 10 to 15 years of waiting."
Steven Blair, a professor of exercise science at the University of South Carolina and past-president of the American College of Sports Medicine, said that while he had not reviewed the book, it's "nonsense" that a person could lose 20 pounds in 30 days.
"It's no secret what we have to do… It's not that complicated," he said. "If you want to lose a pound of fat you have to burn 3,5000 more calories than you eat."
National guidelines released in 2008 recommend 150 minutes of moderate exercise (or 75 minutes of vigorous exercise) each week. National nutrition guidelines say Americans should base dietary decisions off of the well-known "food pyramid," which includes eating three to five cups daily of fruits and vegetables and emphasizes the value of whole grains over processed foods. Not surprisingly, there's no recommendation for junk food intake.
By following those guidelines, Blair said, a person could lose one to two pounds a week, maybe three. But more weight loss than that would require limiting food and water to a point that could create other problems, he said.
In his book, however, Ferriss argues that not all calories are created equal, and that there are ways to boost the number of calories your body burns naturally during the day.
The orgasm argument may stem in part from Ferriss's method of defining it.
The commonly accepted definition of an orgasm is when sexual arousal gets so heightened that it sends the body into spasms, with muscle contractions, heart palpitations, heavy breathing and other physical changes, said Pepper Schwartz, a sociologist and sexologist at the University of Washington. But the female orgasm lasts about 30 to 40 seconds, not minutes on end.
Schwartz said that in her decades of research in sex and relationships she had never heard of a 15-minute long orgasm.
"Can you imagine being in orgasm for 15 minutes? I'm not sure that would be a pleasant experience," she said.
"Could you stay in sustained heightened arousal for a long time? Yes," she said. "But once you have that orgasm the body does a whole lot of funny, interesting things and it then uses up an enormous amount of energy and it doesn't produce that kind of energy in that kind of sustained way."
In his book, Ferriss takes an alternative, "more useful" definition of orgasm.
"Orgasm is when there is no resistance -- no physical or emotional blocking -- to a single point of contact between one finger and the clitoris. This state naturally leads to the involuntary contractions and flushing that most associate with the word orgasm," he writes.