Exercise fixes fast food risks?

[Guest guest]

Hi All,

CR has been suggested to alleviate

many risks of our eating fast food-type

diets. Is the alleviation comparable

using exercise instead? Yes, seems

to be the answer.

However, do not eat the nasty food

while at rest. Continuous consumption

of the fast food diet did help also.

The paper is examining these experiments

in light of their relevance to obesity, but

may also pertain to those of lower weights

Energy intake is a theme of the paper.

The pdf is not available for the in

press below abstract's paper.

Modulatory role of food, feeding regime and physical exercise on

body weight and insulin resistance

Life Sciences, In Press, Corrected Proof, Available online 22

December 2004,

Beate D. Kretschmer, Pierre Schelling, Norbert Beier, Christiane

Liebscher, Sabine Treutel, Krüger, Hans- Scholz and Anke

Haus

Energy intake and expenditure is a highly conserved and

well-controlled system with a bias toward energy intake. In times of

abundant food

supply, individuals tend to overeat and in consequence to increase

body

weight, sometimes to the point of clinical obesity. Obesity is a

disease that is not only characterized by enormous body weight but

also by

rising morbidity for diabetes type II and cardiovascular

complications.

To better understand the critical factors contributing to obesity we

performed the present study in which the effects of energy

expenditure and

energy intake were examined with respect to body weight, localization

of fat and insulin resistance in normal Wistar rats.

It was found that a diet rich in fat and carbohydrates similar to

" fast food " (cafeteria diet) has pronounced implication in the

development of obesity, leading to significant body weight gain, fat

deposition

and also insulin resistance. Furthermore, an irregularly presented

cafeteria diet (yoyo diet) has similar effects on body weight and fat

deposition. However, these rats were not resistant to insulin, but

showed an

increased insulin secretion in response to glucose. When rats were

fed

with a specified high fat/carbohydrate diet (10% fat, 56.7%

carbohydrate) ad lib or at the beginning of their activity phase they

were able to

detect the energy content of the food and compensate this by a lower

intake. They, however, failed to compensate when food was given in

the

resting phase and gained more body weight as controls. Exercise, even

of

short duration, was able to keep rats on lower body weight and

reduced

fat deposition.

Thus, inappropriate food intake with different levels of energy

content is able to induce obesity in normal rats with additional

metabolic

changes that can be also observed in humans.

Cheers, Alan Pater