Hacker News new | ask | show | jobs
by GeekyBear 2762 days ago
Some recent research contradicts those ideas.

Contestants on an extreme weight loss television reality show saw their resting metabolism drop after a rigorous program of exercise.

>The group as a whole on average burned 2,607 calories per day at rest before the competition, which dropped to about 2,000 calories per day at the end.

Six years later, calorie burning had slowed further to 1,900 per day, as reported in the journal Obesity.

https://www.scientificamerican.com/article/6-years-after-the...

Another recent study showed that diet effected metabolism.

>a large new study published on Wednesday in the journal BMJ found that overweight adults who cut carbohydrates from their diets and replaced them with fat sharply increased their metabolisms.

After five months on the diet, their bodies burned roughly 250 calories more per day than people who ate a high-carb, low-fat diet

https://www.nytimes.com/2018/11/14/well/eat/how-a-low-carb-d...

1 comments

That research on the biggest loser participants has since been disproven. Sorry can't pull up those studies easily by mobile do I'll try to update wheni can.
Every time the Biggest Loser study (PMC4989512) gets cited someone pops up and mentions that it's been disproven but I've never seen any citation or followup. In fact, from my research I've seen lots of studies that show that there are long term metabolic changes (PMC6033771) related to adaptive thermogenesis/fat oxidization that is a fat-free mass independent effect on REE (doi: 10.3945/ajcn.115.109173).

Other studies seem to show that the lowered RMR doesn't seem to happen either doing a ketogenic diet (PMC5816424) or with ADF (PMC5042570) vs CR. I also think that the Biggest Loser results are in large part so unsuccessful due to their "crash diet" nature and the lack of any healthy habits being built for maintenance.

* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4989512/

* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6033771/

* https://www.ncbi.nlm.nih.gov/pubmed/26399868

* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5816424/

* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5042570/