Lecture 14 Obesity Trends Among US Adults 1985 2010 Obesity Body Mass Index BMI of 30 or higher Body Mass Index BMI a measure of an adult s weight in relation to his or her height Weight height squared Why are Americans getting bigger Too many calories in not enough calories out Diets Key is one of 2 Things 1 Make people eat less 2 Make people eat differently Key Messages A I was just like you B Other diets don t work o Tried them all but Too complicated Didn t cause weight loss Lose weight but couldn t keep it off Could not stick to it o You have to explain why you failed in the past and why your diet will work C The Eureka moment o I was in the library at Harvard Stanford reading old papers when I found an old paper that had been dismissed forgotten rejected by th medical establishment D Basic principle that sounds science y o Atkins Metabolic advantage o 17 day Metabolic confusion o Zone metabolic state in which you reset your genetic code o Paleo genetics haven t changed but diet has E Why this diet is different Patent claim o Not complicated o Won t be hungry o Eat all you want of something o As long as you avoid something else o Very few emphasize exercise F You MUST o Promise fast weight loss o Catchy title The Zone 17 day Paleo South Beach In past 30 yrs CHO in diet has gone up Percent of Americans weight also increased The Atkins Diet 1972 The Diet Revolution Plan restrict CHO intake but eat as much protein and fat as you want Atkins Method Phases 14 days o 1 slice of bread Ongoing Weight Loss 50 g CHO day o 2 slices of bread Maintenance 100 g CHO day o 1 DD coffee cake muffin According to Dr Atkins When you follow a controlled CHO approach you get what I call a metabolic advantage Possibilities 1 Lose kcal b c you excrete ketones 2 Burn more kcal converting protein CHO 3 Burn more kcal b c high protein diet through thermogenesis Option 1 Loss of kcal by excreting ketones Ketone provide energy for brain when not eating enough kcal or CHO Excrete 20g ketones day 80 kcal 1 lb fat 3500 kcal 6 weeks to lose 1 lb Option 2 Converting protein to CHO lose 40 of the energy in the conversion Make 1000 g glucose costs 70 kcals day about 1 lb in 6 weeks Option 3 Energy expended by thermogenesis following high protein diet increase More thermogenesis could burn extra 50 90 kcal day 4 8 lose 1 lb of fat Metabolic Advantage Lose MAXIMUM of 3 lb in 6 weeks BUT low CHO may work for a while b c 1 people think about what they re eating 2 snack choices were limited cheese pork rinds nuts Problems too complicated and too restrictive
View Full Document
Unlocking...