20 MAR 2018 by ideonexus
Adult Physical Activity Keeps Immune System Young
It is widely accepted that aging is accompanied by remodelling of the immune system including thymic atrophy and increased frequency of senescent T cells, leading to immune compromise. However, physical activity, which influences immunity but declines dramatically with age, is not considered in this literature. We assessed immune profiles in 125 adults (55–79 years) who had maintained a high level of physical activity (cycling) for much of their adult lives, 75 age-matched older adults and ...
1 06 APR 2015 by ideonexus
Ideal Amount of Exercise for Longevity
People who got some exercise, but not enough to meet the physical activity recommendations were still 20 percent less likely to die over a 14-year period than those who did not do any physical activity. (The recommendations say to do 150 minutes of moderate activity per week or 75 minutes of vigorous activity per week.)
People who engaged in the recommended level of physical activity saw even more benefit: They were 31 percent less likely to die during the study period, compared with those w...
1 Who recommendation is 150 minutes moderate or 75 minutes vigorous a week. Three to five times this amount was linked with a 39% reduction in mortality; therefore, 7.5 hours moderate exercise or 3.75 hours vigorous for best results.
23 APR 2012 by ideonexus
Sitting Increases Chances of Cardiovascular Event
Methods: A population sample of 4,512 (1,945 men) Scottish Health Survey 2003 respondents (35 years) were followed up to 2007 for all-cause mortality and CVD events (fatal and nonfatal combined). Main exposures were interviewer-assessed screen time (<2 h/day; 2 to <4 h/day; and 4 h/day) and moderate to vigorous intensity physical activity.
Results: Two hundred fifteen CVD events and 325 any-cause deaths occurred during 19,364 follow-up person-years. The covariable (age, sex, ethnicity,...The longer you sit, the greater your chances of death.
03 SEP 2011 by ideonexus
The Effects of Aging and How Exercise Counteracts Them
• Motor neurons die, particularly from age 60 onward. This causes connections between muscle fibers to wither — and that, in turn, eventually leads to loss and shrinking of muscle fibers. As a result, muscles get smaller and a person gets weaker, says Sandra Hunter, an associate professor of exercise science at Marquette University in Milwaukee. "Physical activity can offset some of that," she says. "But there is this biological aging process going on — the neurons will die regardle...A bullet point list of some of the physiological effects of aging and how exercise reverses these trends.
31 JUL 2011 by ideonexus
Exercise with your Children
This rise in pediatric obesity is painful to hear in the brain science community, especially because we know so much about the relationship between physical activity and mental acuity. Exercise—especially aerobic exercise—is fanastic for the brain, increasing executive function scores anywhere from 50 percent to 100 percent. This is true across the life span, from young children to members of the golden-parachute crowd. Strengthening exercises do not give you these numbers (though ther... 1 
notes
notesExercise is so important for improved cognitive function.
27 JUL 2011 by ideonexus
Morning Sickness as an Evolutionary Strategy
In fact, some evolutionary biologists believe this is why morning sickness still persists in human pregnancies. Morning sickness, which can last the entire day (and, for some women, the entire pregnancy), makes a woman stick to a bland, boring diet—if she eats much at all. This avoidance strategy would have kept our maternal ancestors away from the natural toxins in exotic or spoiled foods in the wild, unregulated menu of the Pleistocene diet. The accompanying fatigue would keep women from ... 1 notes
notesThe nausea encourages women to pursue a bland diet.
19 JUL 2011 by ideonexus
Mother's Hormones Impact a Child's Propensity for Shyness
As we learn more about maternal hormones and their influence on the developing brain, scientists are beginning to propose actual biological mechanisms for the kind of folk prophecies that have been around for ages. One recent study, for instance, suggests that a child's shyness is determined, in part, by maternal hormone fluctuations during gestation. Researchers who interviewed several thousand preschoolers in both the United States and New Zealand noted a significant relationship between th... 1 notes
notesThere appears to be a correlation between the amount of sunlight to which a mother is exposed mid-pregnancy and how shy her children are later on.
