Google "myostatin mice" On Jan 23, 2017 12:52 PM, <ch...@wbmfg.com> wrote:
> More than 300 participants wore accelerometers similar to a Fitbit or > other fitness tracker 24 hours a day for an entire week while their daily > energy expenditure was measured with doubly labeled water. We found that > daily physical activity, tracked by the accelerometers, was only weakly > related to metabolism. On average, couch potatoes tended to spend about 200 > fewer calories each day than people who were moderately active: the kind of > folks who get some exercise during the week and make a point to take the > stairs. But more important, energy expenditure plateaued at higher activity > levels: people with the most intensely active daily lives burned the same > number of calories each day as those with moderately active lives. The same > phenomenon keeping Hadza energy expenditure in line with that of other > populations was evident among individuals in the study. > > *From:* ch...@wbmfg.com > *Sent:* Monday, January 23, 2017 11:49 AM > *To:* af@afmug.com > *Subject:* [AFMUG] OT Calories > > The new issue of scientific american shows that hunter gatherers expend > the same amount of calories per mass as me sitting at a computer. > > “But a funny thing happened on the way to the isotope ratio mass > spectrometer. When the analyses came back from Baylor, the Hadza looked > like everyone else. Hadza men ate and burned about 2,600 calories a day, > Hadza women about 1,900 calories a day—the same as adults in the U.S. or > Europe. We looked at the data every way imaginable, accounting for effects > of body size, fat percentage, age and sex. No difference. How was it > possible? What were we missing? What else were we getting wrong about human > biology and evolution?” > > Part way through the article... >
