March 8, 2012

Sweat Now, Slack off Later

1 Does Your Body Limit Your Daily Exercise?

Two research reports suggest that people have an inborn "activitystat," an amount of daily exercise that their body deems correct, and may compensate for physical workouts by expending less energy later. This seems to hold over a broad age range. In one study, 8-10 year olds from different schools with P.E. times ranging from 1.6 to 9.2 hours per week all engaged in similar amounts of overall physical activity; in another, nearly half of postmenopausal women who took a 13-week walking program unconsciously reduced their overall physical movement when not walking. One researcher suggests that individuals may have a "genetically determined level of preferred energy expenditure," which would help explain why exercise programs frequently fail to significantly reduce weight.

More at the New York Times | Posted 6 years ago by Robert S. Wieder

Tags: Exercise, International Journal of Obesity, Peninsula Medical School, Activitystat, Dr. Terence J. Wilkin, Innate Set Point for Movement, Children's Physical Activity, Energy Expenditure

Read the Comments (1) | Was this Interesting? Yes! (29%) / No! (71%)

It Happens

2 Massive Solar Flare Impacts Earth

A massive solar storm, part of a normal 11-year cycle of activity for the sun, may upset air travel, knock out some power grids and black out some radio transmissions until early Friday morning, say space weather scientists. It may also affect GPS users and certain types of applications, including high-frequency communications used by airplanes. “Power grid operators have all been alerted, as well as the regulatory agencies that all pay attention to this,” says Joseph Kunches, a scientist with the National Oceanic and Atmospheric Administration (NOAA). The solar storms will interact with the Earth’s magnetic field throughout today and “we think there will be more coming,” says Kunches. Want a positive take? Some areas may experience a heightened display of the Northern Lights.

More at Foxnews.com | Hat tip to twirlit.com | Posted 6 years ago by Melody Lesser

Previously: FDA Specifies New Rules for Sunscreens

Tags: Air Travel, National Oceanic and Atmospheric Administration, NOAA, Solar Flare, Solar Flare 2012, Joseph Kunches, Flight Disruptions, Atmospheric Conditions, Power Grid, Earth's Magnetic Field

Comment on This | Was this Interesting? Yes! (45%) / No! (55%)

Raises Ethical Questions

3 Feeling Racist? …Take Some Propanolol

A new study suggests that 40 mg of the beta blocker propranolol may reduce feeling of racism. Half of 36 white males involved in the study were either given the drug which treats angina and low heart rates or a placebo. One to two hours later, they took a "racial Implicit Association Test" (IAT), categorizing words with positive and negative connotations with pictures of black and white people. Over 33 percent of men in the propranolol group had a negative score which is interpreted as being subconsciously non-racist compare to zero percent in the placebo group. Explicit racial prejudice was no different between the two groups. The small size is a weakness of the study but it also brings up the ethical issues of whether or not it is ok to chemically modulate unconscious racial attitudes.

More at The Telegraph | Posted 6 years ago by Kristie Hayes

Previously: Inability to Control Anger Affects Heart Health

Tags: Propanolol, Racism, Racial Attitudes, Racial Implicit Association Test

Read the Comments (3) | Was this Interesting? Yes! (52%) / No! (48%)

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