Re: The influence of resistance and aerobic exercise on hunger

[Guest guest]

After noting the study results, I ask, now what? Why not take the

measurements after a more reasonable amount of time vis a vis the

amount of time a more average person would either run or lift?

Those of us who have either lifted or trained aerobically at high

levels, have experienced the appetite suppressive results, so now we

have a study that tells us that the cause is hormonal. Well well. I

guess that the goal would be to " bottle " the chemical causing the

appetite suppression and sell it (not an evil thought by the way).

But what about the psychological impact of exercise on appetite

suppression? Many, if not most obese people overeat because eating, a

form of oral gratification, is an attempt to deal with anxieties. I

submit that moderate to intense exercise diminishes anxiety and

therefore diminishes hunger.

I am writing this at 2 PM after a one hour advanced yoga class that

ended at noon and an hour of intense leg weight training including

lower back and abdominal work. I had a pint of decafe this AM and a

banana before my workout. Just getting hungry now.

Cheers

Mench

Hollywood Hills, California, USA,

>

> The below may be of interest:

>

> Exercise suppresses appetite by affecting appetite hormones

>

> http://esciencenews.com/articles/2008/12/11/exercise.suppresses.appeti

> te.affecting.appetite.hormones

>

> BETHESDA, Md. (Dec. 11, 2008) & #8722; A vigorous 60-minute workout on a

> treadmill affects the release of two key appetite hormones, ghrelin

> and peptide YY, while 90 minutes of weight lifting affects the level

> of only ghrelin, according to a new study. Taken together, the

> research shows that aerobic exercise is better at suppressing

> appetite than non-aerobic exercise and provides a possible

> explanation for how that happens.

>

> Treadmill versus weight lifting

> There are several hormones that help regulate appetite, but the

> researchers looked at two of the major ones, ghrelin and peptide YY.

> Ghrelin is the only hormone known to stimulate appetite. Peptide YY

> suppresses appetite.

>

> Ghrelin was discovered by researchers in Japan only about 10 years

> ago and was originally identified for its role as a growth hormone.

> Only later did its role in stimulating appetite become known. Peptide

> YY was discovered less than 25 years ago.

>

> In this experiment, 11 male university students did three eight-hour

> sessions. During one session they ran for 60 minutes on a treadmill,

> and then rested for seven hours. During another session they did 90

> minutes of weight lifting, and then rested for six hours and 30

> minutes. During another session, the participants did not exercise at

> all.

>

> During each of the sessions, the participants filled out surveys in

> which they rated how hungry they felt at various points. They also

> received two meals during each session. The researchers measured

> ghrelin and peptide YY levels at multiple points along the way.

> They found that the treadmill (aerobic) session caused ghrelin levels

> to drop and peptide YY levels to increase, indicating the hormones

> were suppressing appetite. However, a weight-lifting (non-aerobic)

> session produced a mixed result. Ghrelin levels dropped, indicating

> appetite suppression, but peptide YY levels did not change

> significantly.

>

> Based on the hunger ratings the participants filled out, both aerobic

> and resistance exercise suppressed hunger, but aerobic exercise

> produced a greater suppression of hunger. The changes the researchers

> observed were short term for both types of exercise, lasting about

> two hours, including the time spent exercising, Stensel reported.

> " The finding that hunger is suppressed during and immediately after

> vigorous treadmill running is consistent with previous studies

> indicating that strenuous aerobic exercise transiently suppresses

> appetite, " Stensel said. " The findings suggest a similar, although

> slightly attenuated response, for weight lifting exercise. "

>

> Focus on active ghrelin

> Previous studies have been inconclusive about whether exercise

> decreases ghrelin levels, but this study may help explain those mixed

> results, according to the researchers.

> Ghrelin comes in two forms, acylated and non-acylated. The

> researchers measured acylated ghrelin, also called active ghrelin,

> because it can cross the blood-brain barrier and reach the appetite

> center in the brain. Stensel suggests that future research

> concentrate on active ghrelin.

> While the study showed that exercise suppresses appetite hormones,

> the next step is to establish whether this change actually causes the

> suppression of eating.

>

> =======================

> Carruthers

> Wakefield, UK

>

[Guest guest]

I just swam for an hour. I'm starving. I'm always starving after swimming.

So, it's not just any " aerobic " exercise.

I'm sure the not-weight-bearing nature of swimming is a factor. Possibly

internal body temperature is a factor with swimming being lower due to the

cooling of the water. I have no idea how close to 70% of maximum oxygen uptake

I am. I'm just glad to get enough air to keep swimming.

Skip Dallen

Covina, CA USA

The influence of resistance and aerobic exercise on

hunger

The below may be of interest:

Exercise suppresses appetite by affecting appetite hormones

http://esciencenews.com/articles/2008/12/11/exercise.suppresses.appeti

te.affecting.appetite.hormones

BETHESDA, Md. (Dec. 11, 2008) & #8722; A vigorous 60-minute workout on a

treadmill affects the release of two key appetite hormones, ghrelin

and peptide YY, while 90 minutes of weight lifting affects the level

of only ghrelin, according to a new study. Taken together, the

research shows that aerobic exercise is better at suppressing

appetite than non-aerobic exercise and provides a possible

explanation for how that happens.

Treadmill versus weight lifting

There are several hormones that help regulate appetite, but the

researchers looked at two of the major ones, ghrelin and peptide YY.

Ghrelin is the only hormone known to stimulate appetite. Peptide YY

suppresses appetite.

Ghrelin was discovered by researchers in Japan only about 10 years

ago and was originally identified for its role as a growth hormone.

Only later did its role in stimulating appetite become known. Peptide

YY was discovered less than 25 years ago.

In this experiment, 11 male university students did three eight-hour

sessions. During one session they ran for 60 minutes on a treadmill,

and then rested for seven hours. During another session they did 90

minutes of weight lifting, and then rested for six hours and 30

minutes. During another session, the participants did not exercise at

all.

During each of the sessions, the participants filled out surveys in

which they rated how hungry they felt at various points. They also

received two meals during each session. The researchers measured

ghrelin and peptide YY levels at multiple points along the way.

They found that the treadmill (aerobic) session caused ghrelin levels

to drop and peptide YY levels to increase, indicating the hormones

were suppressing appetite. However, a weight-lifting (non-aerobic)

session produced a mixed result. Ghrelin levels dropped, indicating

appetite suppression, but peptide YY levels did not change

significantly.

Based on the hunger ratings the participants filled out, both aerobic

and resistance exercise suppressed hunger, but aerobic exercise

produced a greater suppression of hunger. The changes the researchers

observed were short term for both types of exercise, lasting about

two hours, including the time spent exercising, Stensel reported.

" The finding that hunger is suppressed during and immediately after

vigorous treadmill running is consistent with previous studies

indicating that strenuous aerobic exercise transiently suppresses

appetite, " Stensel said. " The findings suggest a similar, although

slightly attenuated response, for weight lifting exercise. "

Focus on active ghrelin

Previous studies have been inconclusive about whether exercise

decreases ghrelin levels, but this study may help explain those mixed

results, according to the researchers.

Ghrelin comes in two forms, acylated and non-acylated. The

researchers measured acylated ghrelin, also called active ghrelin,

because it can cross the blood-brain barrier and reach the appetite

center in the brain. Stensel suggests that future research

concentrate on active ghrelin.

While the study showed that exercise suppresses appetite hormones,

the next step is to establish whether this change actually causes the

suppression of eating.

=======================