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Bodybuilding.com har ett gäng som [http://blog.bodybuilding.com/StudiesAndResearch bloggar om den senaste forskningen]:
Quote:One very common notion that many people have is that as they grow older, they will experience a slowed metabolism, thus making it harder and harder for them to maintain their body weight over time. Many people blame ‘getting older’ for their increased body weight and chalk it up to nature taking its course – which they have no control over.This, however, is incredibly incorrect. To illustrate why, we look at a study that was performed by researchers out of the Center for Physical Activity at the University of Colorado. They wanted to asses the age-related decline in RMR (metabolic rate) in physically active men in relation to total exercise volume as well as energy intake.
To perform the study, they looked at 137 healthy adult men who had been maintaining their weight for at least a time period of 6 months. They looked at 32 younger subjects (26 years of age or less) and 34 older subjects (62 years of age or older) in a sedentary group to act as controls as well as 39 younger males and 32 older males who were of the physically active group (classified as the participation in regular endurance exercises).
The primary measurement to be taken was RMR, which was assessed through indirect calorimetry during an overnight fasting period as well as 24 hours after exercise. Due to the fact that RMR is directly associated with fat free mass and the active subjects had more fat free mass than their sedentary counterparts on average, the readings for RMR were adjusted accordingly.
Once the results were determined it was demonstrated that the RMR in the active men was most correlated with total exercise volume (with not as much regard to exercise intensity) as well as the estimated energy intake consumed by the subjects.
Interestingly, the RMR did not differ significantly between younger or older males who were performing similar total volumes of exercise, proving that the notion that RMR will automatically decline with age is false.
So, the take home message here is that you shouldn’t be so quick to blame the process of aging for your weight gain. What needs to be blamed is the fact that as you’ve grown older, you’ve become more sedentary or have reduced back on the volume of exercise you are able to maintain. It is these changes that correlate more so to a decreased resting metabolic rate over the long term.
[img=http://blog.bodybuilding.com/wp-content/blogs/278512/uploads//senior exercising.jpg]Reference:
Dinneno, FA. Et al. (2001) Age-related decline in RMR in physically active men; relation to exercise volume and energy intake. American Journal of Physiology. Endocrinology and Metabolism. Sep; 281(3):E633-9.
[http://blog.bodybuilding.com/StudiesAndResearch/2009/03/28/do-you-think-your-metabolism-is-slowing-down-with-age/ Läs hela inlägget här…]
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