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Boost Physical Activity to Shed Fat

Posted Aug 04 2013 10:08pm

Previously, researchers from Pittsburgh Children’s Hospital (Pennsylvania, USA) report that increasing physical activity -- without caloric restriction -- is effective in reducing total, fat, visceral obesity, and liver fat in obese adolescent boys.  SoJung Lee and colleagues engaged in a similar study to ascertain insights for teenage girls.  The researchers enrolled 40 obese adolescent girls with BMIs in the 95th percentile or greater for their age. They were randomized to 3 months of aerobic exercise, with three 60-minute sessions on a treadmill a week; resistance exercise consisting of working out on a weigh machine three times a week, for 60 minutes a session; or a sedentary control group.  The teens were allowed to continue to eat as before.  Compared with controls, body weight dropped 1.3 kg in the aerobic exercise group and 0.3 kg in the resistance training group.  Despite the absence of weight loss, total fat decreased 1.5% in the aerobic exercise group and 1.4% in the resistance training group compared with controls.  Visceral fat dropped 19% and lipid fat decreased 43% in the aerobic arm compared with the control arm. Also, insulin sensitivity improved 23% in the girls who did aerobics compared with the sedentary teens.

Lee S, et al.  "Aerobic exercise but not resistance exercise reduces visceral adiposity, liver fat and insulin resistance in obese adolescent girls: A randomized controlled trial" [Abstract 216-OR].  Presented at Annual Meeting of the American Diabetes Association, 27 June 2013.

  
Both aerobic exercise and resistance training are effective at reducing body fat, among previously sedentary adolescent girls.
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Anti-Aging Forum MLDP Join A4M
Tip #192 - Stay Connected
Researchers from the University of Chicago (Illinois, USA) report that social isolation may be detrimental to both mental and physical health. The team analyzed data from the National Social Life, Health, and Aging Project, a nationwide US study involving 3,000 men and women, ages 57 to 85 years. They arrived at three key findings regarding the relationships between health and different types of isolation:

• The researchers found that the most socially connected older adults are three times as likely to report very good or excellent health compared to those who are least connected, regardless of whether they feel isolated.

• The team found that older adults who feel least isolated are five times as likely to report very good or excellent health as those who feel most isolated, regardless of their actual level of social connectedness.

• They determined that social disconnectedness is not related to mental health unless it brings feelings of loneliness and isolation.

Separately, Rush University Medical Center (Illinois, USA) researchers studied 906 older men and women, testing their motor functions (including grip, pinch strength, balance, and walking) and surveying their social activity, for a period of 5 years. Those study participants with less social activity were found to have a more rapid rate of motor function decline. Specifically, the team found that every one-point decrease in social activity corresponded to an increase in functional aging of 5 years, translating to a 40% higher risk of death and 65% higher risk of disability.

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