Physical fitness may buffer some adverse health effects of too much sitting -
The physical form may buffer some adverse health effects of too great meeting, according to a new study by researchers from the American Cancer Society, the Cooper Institute, and the University of Texas. The study appears in the journal Mayo Clinic Proceeding s, and found the association between prolonged sedentary time and obesity and blood markers associated with cardiovascular disease is much less pronounced when taking fitness into account.
sedentary lifestyle has been linked to an increase risk of obesity, metabolic syndrome, type 2 diabetes, cardiovascular disease, certain cancers, and premature death. But previous studies of the association are not taken into account the protective impact fitness, a strong predictor of cardiovascular disease incidence and mortality.
For the current study, researchers led by Kerem Shuval, Ph.D., of the American Cancer Society, examined the association sedentary behavior, physical activity and the ability to obesity and metabolic biomarkers among 1304 men seen at the Cooper clinic in Dallas, Texas between 1981 and 2012. sedentary time was composed of the time watching television and self-reported time spent in a self-report on a car 1982. Fitness survey was determined by a treadmill test during the medical examination at the clinic visits.
The study showed that the more sedentary time was significantly associated with higher levels of systolic blood pressure and total cholesterol and triglycerides and lower levels of HDL, the "good" cholesterol . It has also been associated with BMI, waist circumference and body fat percentage. But when the researchers controlled for fitness, they found prolonged sedentary time was not associated significantly with cholesterol triglycerides / HDL higher (an insulin resistance indicator). Sedentary time was not associated with the metabolic syndrome (a cluster of risk factors). In comparison, the highest fitness levels were associated with decreased adiposity and metabolic measures.
The authors say that the interpretation of the results of their study should be tempered by its limitations. For example, sedentary behavior was based on self-evaluation at some point in time, while fitness was assessed objectively during clinic visits.
"[A] hile our results suggest the need to encourage the achievement of higher levels of fitness through adhering to physical activity guidelines to reduce metabolic risk," they conclude, "the effects of reducing sedentary time on cardiometabolic risk biomarkers justify the additional longitudinal exploration using objective measurement."
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