Clipmarks | dmegivern's 'exercise' clips

Amount of Exercise Needed to Maintain Weight Loss

Sat, 09 Aug 2008 04:26:28 GMT

clipped by: dmegivern

Exercise May Be Needed to Maintain Weight Loss in Overweight Women CME/CE

July 30, 2008 — In addition to limiting energy intake, overweight and obese women may need to exercise 55 minutes a day, 5 days per week, to sustain a weight loss of 10% during 2 years, according to the results of a study reported in the July 28 issue of the Archives of Internal Medicine.

In the current study of overweight and obese women, the addition of at least 275 minutes/week of exercise to reduced energy intake was effective in maintaining a 10% weight loss at 24 months.

In a previous report from the current study cohort, higher intensity or duration of exercise was not more effective than moderate exercise in weight loss or cardiorespiratory fitness.

Tags: weight loss, exercise

Exercise Keeps Cells Young

Thu, 31 Jan 2008 18:15:18 GMT

clipped by: dmegivern

Clip Source: psychcentral.com

Physical Activity Keeps Cells Young

Clip Source: psychcentral.com

A new report in the Archives of Internal Medicine suggests individuals who are physically active during their leisure time appear to be biologically younger than those with sedentary lifestyles. Researchers discovered chromosomes in white blood cells were more robust among active individuals, a finding that helps explain the anti-aging effect of regular exercise.

Telomere length decreased with age, with an average loss of 21 nucleotides (structural units) per year. Men and women who were less physically active in their leisure time had shorter leukocyte telomeres than those who were more active.

Oxidative stress—damage caused to cells by exposure to oxygen—and inflammation are likely mechanisms by which sedentary lifestyles shorten telomeres, the authors suggest. In addition, perceived stress levels have been linked to telomere length. Physical activity may reduce psychological stress, thus mitigating its effect on telomeres and the aging process.

Tags: exercise

Sleep, Food, Exercise, and Weight

Tue, 20 Nov 2007 21:23:06 GMT

clipped by: dmegivern
clipper's remarks: There are more and more articles linking poor quality sleep with weight gain and vice versa.

Clip Source: www.healthday.com

High-Fat Diet Can Disrupt Body's Clock

Like a midnight raid on the fridge for junk food -- sleep often suffers, study says

TUESDAY, Nov. 6 (HealthDay News) -- There's more bad news about a high-fat diet -- it disrupts the body's 24-hour internal (circadian) clock, which regulates sleeping, waking, eating, as well as the daily rhythms of many metabolic functions, U.S. researchers say.

The team also found that a high-fat diet caused changes in genes that encode the circadian clock in the brain and in peripheral tissues (such as fat), resulting in reduced expression of these genes.

"The answer is, yes; alterations in feeding affect timing. We found that as an animal on a high-fat diet gains weight, it eats at the inappropriate time for its sleep/wake cycle -- all of the excess calories are consumed when the animal should be resting. For a human, that would be like raiding the refrigerator in the middle of the night and binging on junk food," Bass said.

Tags: sleep, weight, food, diet, exercise, health