Year: 2012 (page 32 of 55)

on throwing like a girl

Sarah Beth Hill threw a football into an oversized Dr. Pepper can and won a $123,000 scholarship. Image from the Huntsville Times. 

Turns out there is some element of truth to the schoolyard taunt “you throw like a girl!” Girls throwing velocities are quite a bit lower than boys. From Popular Science:

Literature on this put forward by Janet Hyde, professor of psychology and women’s studies at the University of Wisconsin at Madison, for example, has shown the disparity. Her Gender Similarities Hypothesis states, in short, that the two genders are more alike than they are different, and there’s a lot of data to support the idea. (You can, and should, read about how similar we are here.)

Counting standard deviations–the measurement of difference between sets of data–she shows how even the widest psychological differences, like physical aggression (0.60 standard deviations, leaning toward men) aren’t as much as you might expect. Less than 0.10 standard deviations or between 0.11 and 0.35 standard deviations was common, and those are both defined as small differences. She also measured motor behaviors in boys and girls ages 3 to 20 to get a sense of the difference. Some of those, like grip strength (0.66, toward the gentlemen again), were large compared to the rest of the data, but still small to moderate overall. Throwing velocity and throwing distance? Both blowouts, at 2.18 and 1.98 standard deviations, respectively. Well above anything else, psychological or physical.

Check the source link for more.

today’s no duh headline

“Fruit and Veggies Linked to Lower Obesity Rates…” Isn’t this nutrition 101? Read the story at NPR’s the salt blog.

body building

In today’s New York Times there is an article about regenerating muscle tissue using thin sheets of extracellular matrix as a scaffold.

Dr. Peter Rubin, a plastic surgeon at the University of Pittsburgh Medical Center who is a leader of the study, said that early results with Sergeant Strang and a handful of other patients showed that the animal scaffolding was spurring muscle growth. “We are seeing evidence of remodeling of tissues,” he said.

Last fall, Dr. Rubin cut out the scar tissue from Sergeant Strang’s leg and stitched a sheet resembling a thick piece of parchment paper — extracellular matrix from a pig urinary bladder, which had shown excellent results in lab studies — into the remaining healthy thigh muscle.

His body immediately started breaking down the matrix, which consists largely of collagen and other proteins. But the doctors expected, and wanted, that to happen — by degrading into smaller compounds, the matrix started the signaling process, recruiting stem cells to come to the site where they could become muscle cells.

“We’re trying to work with nature rather than fight nature,” said another leader of the study, Dr.Stephen Badylak, deputy director of the McGowan Institute for Regenerative Medicine at the university.

Dr. Badylak is a pioneer in the use of extracellular matrix, having discovered many of its properties more than two decades ago while performing biomedical engineering research at Purdue University. As part of his work on a mechanical heart device, he was looking for a way to move blood from one part of the body to another but wanted to avoid synthetic materials, which can cause blood clots.

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