View Question
 Question
 Subject: Diet versus Exercise Category: Health > Fitness and Nutrition Asked by: dominicbird-ga List Price: \$10.00 Posted: 17 Jul 2006 20:36 PDT Expires: 16 Aug 2006 20:36 PDT Question ID: 747256
 ```What case studies/articles are available, showing that diet is significantly more effective than exercise in achieving weight-loss?```
 Subject: Re: Diet versus Exercise Answered By: hedgie-ga on 17 Jul 2006 21:40 PDT Rated:
 ```Neither if the two is 'more important'. Equations governing the human weight is simple: (energy-in - energy-out) * K = change in the body weight Diet affects energy-in (measured in calories or Joules) - as shown on the packages Exercise affects energy-out as shown by the chart below. Equations is not exact to the 2 decimals, since change in the body weight is due either to storage of excess energy in fat tissue, or in muscle cells - depending on amount of exercise. One gram of fat and of muscle tissue have different energy content. Nevertheless it is good first order approximation and it shows that both factor are important, with exercise having slightly larger effect than the simple equation above would indicate. Here is the same thing in words: Causative factors When food energy intake exceeds energy expenditure, fat cells (and to a lesser extent muscle and liver cells) throughout the body take in the energy and store it as fat. In its simplest conception, therefore, obesity is only made possible when the lifetime energy intake exceeds lifetime energy expenditure http://en.wikipedia.org/wiki/Obesity Energy expenditure of a person doing nothing (sitting on a chair, resting) is same as 100 watt light bulb. During exercise this expenditure goes up. It is somewhat complicated since people use different units (calories, Joules, BTUs ..) for energy, as explained here: http://hendrix.uoregon.edu/~stanm/phys162s2003/Alternative%20Lab%201.htm This free on-line (download and print) booklet http://www.fourmilab.to/hackdiet/www/hackdietf.html has data on power consumption during exercise and energy content of foods. The charts show how the weight of the subject changes in accordance with the equation above. It is valuable, since it shows the fluctuations up to 5 lb about the mean value. Fluctuations are caused by different water content of the body, which is affected by the diuretics and consumption of the salt. The equation describes average value, averaged over several days, and/or when having a neutral diet (same amount of salts). Here are data for power consumption during exercise http://www.wvda.org/calcs/sport.html There is more under the SEARCH TERMS:sports calories burned The other term in the equations can be found under SEARCH TERMS: energy content of food e.g http://www.moe.gov.sg/cpdd/pe/taf/doc/Nutrition%20Tables.pdf. http://www.cdli.ca/CITE/nutrition_information.htm http://en.wikipedia.org/wiki/Food_energy```
 dominicbird-ga rated this answer: ```Tou have not done your reaearch properly and are giving me misleading advise. I know the answer to my question, i just wanted objective clarification. I would like a refund.```

 Subject: Re: Diet versus Exercise From: nautico-ga on 18 Jul 2006 01:54 PDT
 ```My own personal experience has shown that, at least for me, exercise is more important than dieting in achieving weight loss goals. If I had to put percentages on the combo, I'd say 70% for exercise, 30% for dieting. Stated otherwise, if I could do only one or the other (a choice I don't have to make), I could lose weight by only exercising vigorously, but not by dieting alone. No doubt everyone's metabolism is different in this respect.```
 Subject: Re: Diet versus Exercise From: grow_old_and_die-ga on 18 Jul 2006 12:37 PDT
 ```The diet industry is a multi-billion dollar industry... it is ironic that the country where the industry is strongest (financially) is the most obese nation! I was in China recently and I believe that a belly shows is positive as it shows sign of wealth but generally the people are a very healthy weight because there is more exercise in their lifestyle. Note: Much of their diet is fried so the diet is not necessarily that healthy!!!```
 Subject: Re: Diet versus Exercise From: hedgie-ga on 20 Jul 2006 03:09 PDT
 ```Nautico, As well known, science cannot compete with strongly held popular beliefs, superstition and advertising and myths. It should not even try. However, one does loose weight by fasting alone, in spite of the fact that without exercise the metabolim slows doen during the fast. (It will be less then 100W - byt eq. I quoted dtill holds. To put percentages on value of expression X= a - b 70 % for a 30 % for b is nonsense. This book, describe weight loss by fasting. It is written by MD should be read before anyone attempts that i(there are some precutions to be followed). http://www.amazon.com/gp/product/0803893825/104-4570476-0098304v=glance&n=283155 and please, read the disclaimers below. This is not a medical advice. Rather, it is law of physics. It is sometimes called 'law of conservation of energy' and it's applicability to organism was tested - even though it was never seriously in doubt. Hedgie```
 Subject: Re: Diet versus Exercise From: nautico-ga on 20 Jul 2006 05:10 PDT
 ```Hedgie, my "nonsense" notwithstanding, the 30-70 importance ratio that I cited simply approximates what works for me. I didn't claim it was based on science.```
 Subject: Re: Diet versus Exercise From: hedgie-ga on 20 Jul 2006 05:12 PDT
 ```correction without exercise the metabolim slows doen during the fast. (It will be less then 100W - byt eq. I quoted dtill holds. To put percentages on value of expression X= a - b 70 % for a 30 % for b should be without exercise the metabolism slows down during the fast. (It will be less then 100W - but eq. I quoted above still holds. To put percentages on value of expression X= a - b 70 % for a 30 % for b is nonsense. Sorry about the typos.```
 Subject: Re: Diet versus Exercise From: bowler-ga on 20 Jul 2006 15:04 PDT
 ```I think the researcher dropped the ball on this one. Hedgie, I've seen your work on other questions and realize you are an experienced and good researcher. But, the customer asked for articles to support his/her claim and the answer you provided did nothing to support the claim but expressed an opinion you had on the subject. I think that could have been expressed in a comment or clarifiaction with something to the effect of "I have not been able to find any articles supporting your claim..." Even if you don't agree with a point of view, as a researcher you should be objective and provide information on what they are asking for, provided it exists. If not then just tell the customer that nothing exists. I usually don't question what a researcher does but a think the cutomer is right in this situation.```
 Subject: Re: Diet versus Exercise From: hedgie-ga on 21 Jul 2006 04:30 PDT
 ```bowler-ga I appreciate your comment and opinion, and I do understand that dominic bird is not happy. However I do not see this as " Even if you don't agree with a point of view .." There are opinions, and subjective experience (dreams, faith ..) and there are objective facts. SEARCH TERMS: fasting has many examples showing that fasting without excercise leads to the reduction of weight. Where else would the energy to run body fuctions come from? It comes from energy stored in fat. As I explained elswhere: some 'questions' are not questions, but alternative theories or gropes. These are OK, as long as asker really wants an honest opinion example http://answers.google.com/answers/threadview?id=433561 see http://answers.google.com/answers/threadview?id=701289 To look for evidence of something which is not true would not be ethical (some 'sponsored research' does that - - there are many "proofs" that nicotin is not adictive, and canabis is) I do not do that. Customer can always ask for refund. For me this is not issue of money, but issue of principle. As I also explained elsewhere, my goals are 1) to tell the truth 2) to get 5 stars 3) to make some money In THAT order. Hedgie```
 Subject: Re: Diet versus Exercise From: myoarin-ga on 21 Jul 2006 05:09 PDT
 ```Regardless of the differences above, from my experience, additional exercise is beneficial in that improved muscle tone, especially around the midriff, will improve one's figure (even without weight loss). Of course, if one really has a belly, then this won't be so effective, but if one can still "suck it in", it just takes a little willpower to do appropriate exercises that will help eliminate that "overly relaxed" paunch, help one's posture. It may be a case of "he carries his weight well", but it makes a difference.```
 Subject: Re: Diet versus Exercise From: boquinha-ga on 07 Aug 2006 08:24 PDT
 `http://answers.google.com/answers/faq.html#refund`