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Weight Loss: Not One Size Fits All -Science Digest
SUMMARY
Results vary in 12 week supervised exercise induced weight loss trials with 35 obese and overweight subjects. "Compensatory Responses", including eating more (working up an appetite?) were observed as some of the reason for individual variations in weight loss response. Reminds me of Mr. Banning's 1862 comments about exercise not reducing weight but givng rise to a healthy appetite. ================================================== ============== http://www.sciencedaily.com/releases...1101092802.htm Weight Loss: Not One Size Fits All ScienceDaily (Nov. 7, 2007) — There is no "one size fits all" when it comes to weight loss through exercise, says Queensland University of Technology behavioural scientist Neil King. Dr Neil King, from QUT's Institute of Health and Biomedical Innovation, is the lead author of a study conducted in collaboration with the University of Leeds in the UK, which has been published recently in the International Journal of Obesity. "When it comes to losing weight, a lot of people assume if you lose less than the predicted weight then you aren't exercising enough, and that is why you aren't getting the desired results," Dr King said. "This study is the first evidence-based study that shows despite people doing the same amount of supervised exercise people lose different amounts of weight." The study, which focused on 35 overweight and obese people from the UK, sought to identify and characterise the variability in exercise-induced weight loss. Participants undertook a 12-week supervised exercise program that was individually tailored to expend 500 calories per session. During this time their weight loss and behavioural outcomes were monitored. Dr King said the study found the role of exercise as an effective weight management method could be undermined by "compensatory responses" such as a person's increased hunger and food intake as a result of their increased energy expenditure. "People, who we refer to as compensators, are those who compensate for the increase in exercise-induced energy expenditure, by adjusting their food intake" he said. "For some people this might be in responses to an automatic biological drive, whereas for others it might be a deliberate reward-based increase." Dr King said what this study showed was that some individuals were predisposed to compensatory responses, rendering them resistant to the theoretical weight loss benefits of exercise. "The individual variability here demonstrates the need to treat people as individuals," he said. "It also highlights the importance of determining the mechanisms that may explain this variability, such as how to treat the more resistant compensatory person to improve their weight management outcomes. "Those resistant to exercise might be better suited to weight management strategies which include controlled dietary intake, in addition to exercise." Dr King said the novelty and therefore the strength of this study, was that the exercise was supervised. "Therefore, unlike unsupervised exercise interventions, any variability in weight loss cannot be explained by differences in exercise compliance," he said. Adapted from materials provided by Queensland University of Technology. |
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Weight Loss: Not One Size Fits All -Science Digest
My personal experience here suggests a some thoughts. 1) intense exercise
is more likely to induce additional drive to eat. 2) moderate exercise doesn't increase appetite and may lower it. 3) Extended duration exercise ramps appetite unless the intensity is held under a certain level.4) Certain kinds of extended exercise might contain periods of highly intense activity and low intensity activity. 5) The more high intensiy exercise present, the greater the desire to compensate via overeating. Even if the intensity is low, if done long enough, it will ramp appetite. I think what is intense depends on the person. Achieving 90% or more of max heart rate is intense. I think that for weight loss, one can use high intensity exercise, but one much be careful not to do too much, Again, that depends on the person. Over time, one can work up a curve so that more intense exercise can be done without a response to compensate by eating. I think high intensity exercise is more protective of the heart than low intensity, assuming of course that one survives the HI exercise. It is possible for two people who weigh the same to have very different ability and background for exercise, and thus have completely different responses to a 500-kcal session of exercise. Furthermore, there is a huge difference in 500-kcals burned over and hour vs 30 minutes. Looking only at work done without paying attention to power output is not going to make for a good study, IMO. "Jim" wrote in message ... SUMMARY Results vary in 12 week supervised exercise induced weight loss trials with 35 obese and overweight subjects. "Compensatory Responses", including eating more (working up an appetite?) were observed as some of the reason for individual variations in weight loss response. Reminds me of Mr. Banning's 1862 comments about exercise not reducing weight but givng rise to a healthy appetite. ================================================== ============== http://www.sciencedaily.com/releases...1101092802.htm Weight Loss: Not One Size Fits All ScienceDaily (Nov. 7, 2007) — There is no "one size fits all" when it comes to weight loss through exercise, says Queensland University of Technology behavioural scientist Neil King. Dr Neil King, from QUT's Institute of Health and Biomedical Innovation, is the lead author of a study conducted in collaboration with the University of Leeds in the UK, which has been published recently in the International Journal of Obesity. "When it comes to losing weight, a lot of people assume if you lose less than the predicted weight then you aren't exercising enough, and that is why you aren't getting the desired results," Dr King said. "This study is the first evidence-based study that shows despite people doing the same amount of supervised exercise people lose different amounts of weight." The study, which focused on 35 overweight and obese people from the UK, sought to identify and characterise the variability in exercise-induced weight loss. Participants undertook a 12-week supervised exercise program that was individually tailored to expend 500 calories per session. During this time their weight loss and behavioural outcomes were monitored. Dr King said the study found the role of exercise as an effective weight management method could be undermined by "compensatory responses" such as a person's increased hunger and food intake as a result of their increased energy expenditure. "People, who we refer to as compensators, are those who compensate for the increase in exercise-induced energy expenditure, by adjusting their food intake" he said. "For some people this might be in responses to an automatic biological drive, whereas for others it might be a deliberate reward-based increase." Dr King said what this study showed was that some individuals were predisposed to compensatory responses, rendering them resistant to the theoretical weight loss benefits of exercise. "The individual variability here demonstrates the need to treat people as individuals," he said. "It also highlights the importance of determining the mechanisms that may explain this variability, such as how to treat the more resistant compensatory person to improve their weight management outcomes. "Those resistant to exercise might be better suited to weight management strategies which include controlled dietary intake, in addition to exercise." Dr King said the novelty and therefore the strength of this study, was that the exercise was supervised. "Therefore, unlike unsupervised exercise interventions, any variability in weight loss cannot be explained by differences in exercise compliance," he said. Adapted from materials provided by Queensland University of Technology. |
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Weight Loss: Not One Size Fits All -Science Digest
In article , Jim says...
Dr King said the novelty and therefore the strength of this study, was that the exercise was supervised. "Therefore, unlike unsupervised exercise interventions, any variability in weight loss cannot be explained by differences in exercise compliance," he said. I was subjected to a supervised exercise and diet program in the late 1970s, courtesy of the US Army. During 8 weeks of basic training, we averaged about 7-10 miles of road marches with 30 lbs of gear on our backs almost daily. Lots of push-ups, sit-ups and running were also mixed in to our daily routine. For us that were overweight, the NCOs watched what we ate from the chow line. If we took too much of something, they would come along and make us give it to a skinny guy. I couldn't complain, as I voluntarily enlisted. I wasn't drafted. My weight loss during that 8 weeks was 29 lbs. Compulsory weigh-ins during my time in the service made it mandatory that I continue to exercise and eat responsibly to avoid having to go into their special diet/exercise program. It was rumored that some Russian generals met with their US counterparts and made the observation that "In our Army, the Generals are fat and the soldiers are lean. In your Army, it appears to be the other way around." That was the start of the rigorous phyical testing and weight standards being adopted by the US Army. Mark |
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