Fascinating Study Reveals What Your Brain Looks like on p90X3 Exercise
‘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 since I was a little girl. And I went on ‘The Biggest Loser’ journey to find that confidence that I lost.” For breakfast, Frederickson, who has discovered “a zest for looking up recipes and trying them,” sticks to egg white French toast or an omelet made with egg whites, spinach, tomatoes and mushrooms. Meanwhile, before the weigh-in, she said she’d been taking “maybe three, four [exercise] classes a day,” including Zumba and spin.
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Shivering and exercise convert white fat to brown
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 http://www.sbwire.com/press-releases/p90x3-reviews/sbwire-455028.htm 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. The puzzling aspect of the finding was that exercise itself produces heat, so why would exercising muscle initiate a process that would generate yet more heat?
For the original version including any supplementary images or video, visit http://scienceblog.com/70296/shivering-and-exercise-convert-white-fat-to-brown/
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. Their sympathetic nervous system grows many more branches – too many.
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