Shivering ‘as good as exercise’ for producing brown fat
When that energy is insufficient, muscle contracts mechanically, or shivers, thereby generating heat. However we did not know how muscle and fat communicate in this process. So we exposed volunteers to increasing cold, from 18 to 12 degrees, until they shivered. We drew blood samples to measure hormone levels and detected shivering by special devices placed on the skin that sense muscle electrical activity. Volunteers started to shiver by around 16 or 14 degrees, varying between individuals. We identified two hormones that are stimulated by cold irisin and FGF21 released from shivering muscle and brown fat respectively. These hormones fired up the energy-burning rate of human white fat cells in the laboratory, and the treated fat cells began to emit heat a hallmark of brown fat function. A team from Harvard University discovered irisin through NIH-funded research in 2012 , identifying it as a muscle hormone stimulated by exercise that turned white fat in animals into brown fat.
For the p90X3 results original version including any supplementary images or video, visit http://scienceblog.com/70296/shivering-and-exercise-convert-white-fat-to-brown/
Fascinating Study Reveals What Your Brain Looks like on Exercise
The reality TV star, who shocked the fans of the show by losing 155 pounds, said that she follows a strict “super healthy” diet and exercise regimen laid out for her by the show’s dietician, Cheryl Forberg. ‘The Biggest Loser’ Winner Rachel Frederickson Weighs 105 Pounds “First and foremost, my goals are to be healthy and strong,” the 24-year-old, who is now a size 0/2, told reporters, according to People magazine . “I’m an athlete. I’ve been an athlete http://www.sbwire.com/press-releases/p90x3-reviews/sbwire-455028.htm since I was a little girl.
For the original version including any supplementary images or video, visit http://abcnews.go.com/Entertainment/biggest-loser-winner-rachel-frederickson-shares-diet-exercise/story?id=22408780
‘Biggest Loser’ Rachel Frederickson Shares Diet and Exercise Secrets
But the researchers of this most recent study note that exercise produces heat in itself. Therefore, they questioned why exercising muscle would prompt a mechanism that produces more heat. In order to find out, the same volunteers carried out exercise tests. The process in which muscles release irisin during exercise was compared with the process in which they release the hormone through shivering.
For the original version including any supplementary images or video, visit http://www.medicalnewstoday.com/articles/272258.php
But no, I was wrong. And the article – along with the study that spawned it – is, indeed, intriguing. What happens when you have two sets of rats: one that runs three miles on a treadmill every day and another that is sedentary? What happens if after three months of either activity or inactivity, you check the development of their brains’ sympathetic nervous system – the part that controls unconscious things like breathing? Related: You’ll save money on therapy…and 7 more unexpected benefits of exercise What you find, according to the study done by scientists at Wayne State University School of Medicine and published in the Journal of Comparative Neurology , is that the sedentary rats’ brains develop abnormally.
For the original version including any supplementary images or video, visit http://shine.yahoo.com/healthy-living/fascinating-study-reveals-brain-looks-exercise-205800224.html
Mother Goose 