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Diet Alone - Unlikely Leads to Significant Weight Loss
A primate study, 18 female rhesus macaque monkey - on a high-fat diet
for several years - then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. During the next month of observation - no weight loss, but a decline in activity. Further reduction of food calories in the following month resulted in even less physical activity. Three monkeys on a normal diet were trained exercise 1 hour daily, and these treadmill exercising monkeys did loose weight. Much of this sounds familiar to readers of Taubes' "Good Calories, Bad Calories". I went from 240 pounds to 175 pounds following a summer of Low Carb plus about 1,000 miles of bicycling in 2004. Science News Diet Alone Will Not Likely Lead to Significant Weight Loss, Study Suggests ScienceDaily (Apr. 14, 2010) — Newly published research by scientists at Oregon Health & Science University demonstrates that simply reducing caloric intake is not enough to promote significant weight loss. This appears to be due to a natural compensatory mechanism that reduces a person's physical activity in response to a reduction in calories. The research is published in the April edition of the American Journal of Physiology -- Regulatory, Integrative and Comparative Physiology. http://dx.doi.org/10.1152/ajpregu.00617.2009 "In the midst of America's obesity epidemic, physicians frequently advise their patients to reduce the number of calories they are consuming on a daily basis. This research shows that simply dieting will not likely cause substantial weight loss. Instead, diet and exercise must be combined to achieve this goal," explained Judy Cameron Ph.D., a senior scientist at OHSU's Oregon National Primate Research Center, and a professor of behavioral neuroscience and obstetrics & gynecology in the OHSU School of Medicine, as well as a professor of psychiatry at the University of Pittsburgh. To conduct the research, Cameron and OHSU post-doctoral fellow Elinor Sullivan, Ph.D., studied 18 female rhesus macaque monkeys at the Oregon National Primate Research Center. The monkeys were placed on a high-fat diet for several years. They were then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. For a one-month period, the monkeys' weight and activity levels were closely tracked. Activity was tracked through the use of an activity monitor worn on a collar. "Surprisingly, there was no significant weight loss at the end of the month," explained Sullivan. "However, there was a significant change in the activity levels for these monkeys. Naturally occurring levels of physical activity for the animals began to diminish soon after the reduced-calorie diet began. When caloric intake was further reduced in a second month, physical activity in the monkeys diminished even further." A comparison group of three monkeys was fed a normal monkey diet and was trained to exercise for one hour daily on a treadmill. This comparison group did lose weight. "This study demonstrates that there is a natural body mechanism which conserves energy in response to a reduction in calories. Food is not always plentiful for humans and animals and the body seems to have developed a strategy for responding to these fluctuations," added Cameron. "These findings will assist medical professionals in advising their patients. It may also impact the development of community interventions to battle the childhood obesity epidemic and lead to programs that emphasize both diet and exercise." The research was supported by the National Institutes of Health. Story Source: Adapted from materials provided by Oregon Health & Science University, via EurekAlert!, a service of AAAS. Journal Reference: 1. Sullivan et al. A rapidly occurring compensatory decrease in physical activity counteracts diet-induced weight loss in female monkeys. AJP Regulatory Integrative and Comparative Physiology, 2010; 298 (4): R1068 DOI: 10.1152/ajpregu.00617.2009 http://dx.doi.org/10.1152/ajpregu.00617.2009 |
#2
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Diet Alone - Unlikely Leads to Significant Weight Loss
On Apr 14, 9:39*am, pamela wrote:
A primate study, 18 female rhesus macaque monkey - on a high-fat diet for several years - then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. During the next month of observation - no weight loss, but a decline in activity. Further reduction of food calories in the following month resulted in even less physical activity. Three monkeys on a normal diet were trained exercise 1 hour daily, and these treadmill exercising monkeys did loose weight. Much of this sounds familiar to readers of Taubes' "Good Calories, Bad Calories". *I went from 240 pounds to 175 pounds following a summer of Low Carb plus about 1,000 miles of bicycling in 2004. Science News Diet Alone Will Not Likely Lead to Significant Weight Loss, Study Suggests ScienceDaily (Apr. 14, 2010) — Newly published research by scientists at Oregon Health & Science University demonstrates that simply reducing caloric intake is not enough to promote significant weight loss. This appears to be due to a natural compensatory mechanism that reduces a person's physical activity in response to a reduction in calories. The research is published in the April edition of the American Journal of Physiology -- Regulatory, Integrative and Comparative Physiology.http://dx.doi.org/10.1152/ajpregu.00617.2009 "In the midst of America's obesity epidemic, physicians frequently advise their patients to reduce the number of calories they are consuming on a daily basis. This research shows that simply dieting will not likely cause substantial weight loss. Instead, diet and exercise must be combined to achieve this goal," explained Judy Cameron Ph.D., a senior scientist at OHSU's Oregon National Primate Research Center, and a professor of behavioral neuroscience and obstetrics & gynecology in the OHSU School of Medicine, as well as a professor of psychiatry at the University of Pittsburgh. To conduct the research, Cameron and OHSU post-doctoral fellow Elinor Sullivan, Ph.D., studied 18 female rhesus macaque monkeys at the Oregon National Primate Research Center. The monkeys were placed on a high-fat diet for several years. They were then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. For a one-month period, the monkeys' weight and activity levels were closely tracked. Activity was tracked through the use of an activity monitor worn on a collar. "Surprisingly, there was no significant weight loss at the end of the month," explained Sullivan. "However, there was a significant change in the activity levels for these monkeys. Naturally occurring levels of physical activity for the animals began to diminish soon after the reduced-calorie diet began. When caloric intake was further reduced in a second month, physical activity in the monkeys diminished even further." A comparison group of three monkeys was fed a normal monkey diet and was trained to exercise for one hour daily on a treadmill. This comparison group did lose weight. "This study demonstrates that there is a natural body mechanism which conserves energy in response to a reduction in calories. Food is not always plentiful for humans and animals and the body seems to have developed a strategy for responding to these fluctuations," added Cameron. "These findings will assist medical professionals in advising their patients. It may also impact the development of community interventions to battle the childhood obesity epidemic and lead to programs that emphasize both diet and exercise." The research was supported by the National Institutes of Health. Story Source: * * *Adapted from materials provided by Oregon Health & Science University, via EurekAlert!, a service of AAAS. Journal Reference: * * 1. Sullivan et al. A rapidly occurring compensatory decrease in physical activity counteracts diet-induced weight loss in female monkeys. AJP Regulatory Integrative and Comparative Physiology, 2010; 298 (4): R1068 DOI: 10.1152/ajpregu.00617.2009 http://dx.doi.org/10.1152/ajpregu.00617.2009 The title should be changed from "Diet alone..." to "REDUCTION OF CALORIES alone..." Here is a definiton of diet: "A special or limited selection of food and drink, chosen or prescribed to promote health or a gain or loss of weight" That definition is not about cutting food intake, but of WHAT you put in your body. For my part, I keep notes of my calorie intake only for future studies. I've been on low-carb diet for a few days (mostly fish, chicken, almonds, pumpkin seeds, natural peanut butter) and shed 8 pounds in 5 days. |
#3
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Diet Alone - Unlikely Leads to Significant Weight Loss
In article ,
pamela wrote: Thanks for the study. If nothing else, it reaffirms by beliefs based on what I've read. I lost 30 lbs about 9 months ago, with low carb, but I seem to have hit a plateau. Damn, I may get desperate enough to exercise;O) A primate study, 18 female rhesus macaque monkey - on a high-fat diet for several years - then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. During the next month of observation - no weight loss, but a decline in activity. Further reduction of food calories in the following month resulted in even less physical activity. Three monkeys on a normal diet were trained exercise 1 hour daily, and these treadmill exercising monkeys did loose weight. Much of this sounds familiar to readers of Taubes' "Good Calories, Bad Calories". I went from 240 pounds to 175 pounds following a summer of Low Carb plus about 1,000 miles of bicycling in 2004. Science News Diet Alone Will Not Likely Lead to Significant Weight Loss, Study Suggests ScienceDaily (Apr. 14, 2010) ‹ Newly published research by scientists at Oregon Health & Science University demonstrates that simply reducing caloric intake is not enough to promote significant weight loss. This appears to be due to a natural compensatory mechanism that reduces a person's physical activity in response to a reduction in calories. The research is published in the April edition of the American Journal of Physiology -- Regulatory, Integrative and Comparative Physiology. http://dx.doi.org/10.1152/ajpregu.00617.2009 "In the midst of America's obesity epidemic, physicians frequently advise their patients to reduce the number of calories they are consuming on a daily basis. This research shows that simply dieting will not likely cause substantial weight loss. Instead, diet and exercise must be combined to achieve this goal," explained Judy Cameron Ph.D., a senior scientist at OHSU's Oregon National Primate Research Center, and a professor of behavioral neuroscience and obstetrics & gynecology in the OHSU School of Medicine, as well as a professor of psychiatry at the University of Pittsburgh. To conduct the research, Cameron and OHSU post-doctoral fellow Elinor Sullivan, Ph.D., studied 18 female rhesus macaque monkeys at the Oregon National Primate Research Center. The monkeys were placed on a high-fat diet for several years. They were then returned to a lower-fat diet (standard monkey food) with a 30 percent reduction in calories. For a one-month period, the monkeys' weight and activity levels were closely tracked. Activity was tracked through the use of an activity monitor worn on a collar. "Surprisingly, there was no significant weight loss at the end of the month," explained Sullivan. "However, there was a significant change in the activity levels for these monkeys. Naturally occurring levels of physical activity for the animals began to diminish soon after the reduced-calorie diet began. When caloric intake was further reduced in a second month, physical activity in the monkeys diminished even further." A comparison group of three monkeys was fed a normal monkey diet and was trained to exercise for one hour daily on a treadmill. This comparison group did lose weight. "This study demonstrates that there is a natural body mechanism which conserves energy in response to a reduction in calories. Food is not always plentiful for humans and animals and the body seems to have developed a strategy for responding to these fluctuations," added Cameron. "These findings will assist medical professionals in advising their patients. It may also impact the development of community interventions to battle the childhood obesity epidemic and lead to programs that emphasize both diet and exercise." The research was supported by the National Institutes of Health. Story Source: Adapted from materials provided by Oregon Health & Science University, via EurekAlert!, a service of AAAS. Journal Reference: 1. Sullivan et al. A rapidly occurring compensatory decrease in physical activity counteracts diet-induced weight loss in female monkeys. AJP Regulatory Integrative and Comparative Physiology, 2010; 298 (4): R1068 DOI: 10.1152/ajpregu.00617.2009 http://dx.doi.org/10.1152/ajpregu.00617.2009 -- - Billy "Fascism should more properly be called corporatism because it is the merger of state and corporate power." - Benito Mussolini. http://www.youtube.com/watch?v=Arn3lF5XSUg http://www.thirdworldtraveler.com/Zinn/HZinn_page.html |
#5
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Diet Alone - Unlikely Leads to Significant Weight Loss
In article ,
Doug Freyburger wrote: His story is starting to wander. I think it's time to bring out the bright light and the rubber hose, if we want to get the truth, if anyone cares. wrote: http://dx.doi.org/10.1152/ajpregu.00617.2009 The title should be changed from "Diet alone..." to "REDUCTION OF CALORIES alone..." There's a bit more to it than that. The test monkeys when from a medium calorie high fat diet to a low calorie low fat diet without losing. It was not the first study to compare those two strategies. That's been done with humans as well. The mixture of fuels matters in addition to the total energy of the fuel. For my part, I keep notes of my calorie intake only for future studies. I've been on low-carb diet for a few days (mostly fish, chicken, almonds, pumpkin seeds, natural peanut butter) and shed 8 pounds in 5 days. In another post you wrote that you went from 195 to 170 in 45 days. I take it that was a different attempt or that was on a slightly different food list so you reset your starting date? I hope you also ate veggies. The foods you listed are meats and meat-like substitutes. Nuts, seeds and legumes do count technically as veggies rather like cucumbers count technically as fruit. There status is more of a technicality than a generally accepted categorization. -- - Billy "Fascism should more properly be called corporatism because it is the merger of state and corporate power." - Benito Mussolini. http://www.youtube.com/watch?v=Arn3lF5XSUg http://www.thirdworldtraveler.com/Zinn/HZinn_page.html |
#6
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Diet Alone - Unlikely Leads to Significant Weight Loss
On Apr 14, 3:07*pm, Doug Freyburger wrote:
In another post you wrote that you went from 195 to 170 in 45 days. *I take it that was a different attempt or that was on a slightly different food list so you reset your starting date? I hope you also ate veggies. *The foods you listed are meats and meat-like substitutes. *Nuts, seeds and legumes do count technically as veggies rather like cucumbers count technically as fruit. *There status is more of a technicality than a generally accepted categorization. Yes, the 195 to 170 was one or two years ago, and I lost 8 pounds in 5 days in the last week. I resume my veggie intake. I had enough of these nuts and meat and did not care for anything else. I had a mix of a can of tuna with a can of green beans, and I had to force myself to eat these 250 calories. Then I becom a bit worried about not having fresh veggies and fruits. I had a banana today with natural, not salted peanut butter. It's a wonderful mix of tastes. I know banana are high in carbs, but they do provide potassium and have fibers. That's all I had for carbs today, anyway. |
#7
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Diet Alone - Unlikely Leads to Significant Weight Loss
On Apr 14, 4:43*pm, Billy wrote:
In article , *Doug Freyburger wrote: His story is starting to wander. I think it's time to bring out the bright light and the rubber hose, if we want to get the truth, if anyone cares. Nothing sinister. I was referring to two distinct periods. Go back to my posts I wrote through the years, and you'll see enjoyed the lows of 168 pounds and the sadness of the 197 pounds. I've been on and off my several weight-management programs. Now I hope I'll stay on the right track. I thank Doug for always been there for me through the years. He always replied to my questions and help me. Free of charge, I should say. -- - Billy "Fascism should more properly be called corporatism because it is the merger of state and corporate power." - Benito Mussolini.http://www.youtube.com/watch?v=Arn3l...inn_page.html- Hide quoted text - - Show quoted text - |
#8
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Diet Alone - Unlikely Leads to Significant Weight Loss
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Diet Alone - Unlikely Leads to Significant Weight Loss
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#10
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Diet Alone - Unlikely Leads to Significant Weight Loss
On Apr 15, 2:47*pm, Doug Freyburger wrote:
wrote: Billy wrote: I think it's time to bring out the bright light and the rubber hose Nothing sinister. Drat. *I was so looking forward to the rubber hose. *The entire latex outfit for that matter. *Spot light, dancing pole, loud cheesy music, latex outfit. *Oh wait. Michael not Michelle. Never mind. Must be the other meaning for it. *You ate a legume in week 4? *Whack! I hope I can continue getting your full support. |
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