EATING FISH: THE GOOD, THE BAD AND THE UGLY
Moderate fish consumption reduces the risk of Alzheimer’s disease but increases mercury levels in the brain- according to a study of nearly 1,000 people led by Martha Morris from University Medical Center in Chicago. Consumption of six oil supplements was not related to improved brain function. Mercury is a highly toxic pollutant that enters the environment from coal-using electrical plants, waste incinerators and byproducts of various manufactured goods. Mercury accumulates in several species of large fish, such as tuna, shark and swordfish. Mercury is particularly toxic to children and pregnant women. It is linked to neurological abnormalities , damage to brain centers controlling movement, seizures and developmental and mental retardation. It also impairs the reproductive system in men, and decreases blood tester one and sperms production. Mercury poisoning is a major public health issue in populations that eat a lot of fish, such as Inuits in Northern Canada. High mercury level can injure the kidneys, brain and lungs. Mercury accumulates in large fish such as tuna, so eating large quantities can cause health problems. (Journal American Medical Association, 315: 489-497,2016)
MINDFULLNESS HAS NO EFFECT on Weight Loss or Metabolic Health
Mindfullness is focusing attention on internal and external experiences with techniques such as meditation. Most people who lose weight through weight control programs gain it back within 12 months. Jennifer Daubenmier from the University of California, San Francisco and co-workers, found that employing mindfulness techniques during weigh loss had no additional effect on weigh loss, blood sugar, wait circumference, blood pressure or C-reactive protein (a blood marker of inflammation). Mindfulness techniques do not appear effective for promoting weight loss (Obesity, published online March 2016)
HIIT EFFECTIVE FOR FAT LOSS
High intensity interval training (HIIT)- repeated bouts of high-intensity exercise followed by rest-builds fitness quickly and has changed the way many people train. Gordon Fisher from the Department of Human Studies of Alabama at Birmingham, and colleagues, concluded that HIIT and traditional endurance excursus have similar effects on aerobic capacity, insulin sensitivity, blood pressure and blood fats. Twenty-eight sedentary, overweight men practiced HIIT or aerobics for six weeks. HIIT consisted of four 30-second sprints on a stationary bike at 85 percent of maximum effort, while aerobics consisted of 45 to 60 minutes of cycling at 55 to 65 percent of maximum effort. HIIT produced the same changes in one hour per week as aerobics, practiced five hours per week. HIIT promotes fat loos in less time than traditional aerobics.
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