RE: Leptin Update; (Was: intermittent fasting)

[Guest guest]

>>>The prime fat burning exercise for weight loss is mild aerobic

activity, lasting at least one hour and ideally for one and a half

hours.

I call that the " Fat burning myth " . Mild aerobic exercise may burn a

higher % of fat of the total calories burned, but not more total fat, as

mild aerobic activity doesn't burn a lot of total calories. So you got a

higher percent of a lower number. Higher intensity aerobics burn a

lesser % fat (Of the total calories burned) but you would burn more

total calories and in the end, burn more total fat. A lower percent of

a higher number which works out to a higher total number. (I can post

some actual numbers if anyone wants to see them)

>>Heart rate and intensity are of secondary importance. Feeling

refreshed when done is vital. To access fat burning mode, either

exercise first thing in the morning before eating food or several hours

after eating. Once done exercising one should not eat until hungry. If a

person feels good energy and is not hungry they may burn a half pound of

actual fat over the next hour.

I don't see how this can be. To burn a half a pound of one would need

to burn up about 1750 calories. I am not sure how anyone can burn 1750

calories in an hour. Running at 10 mph (Which is pretty fast) burns

about 7 cal/hr/# so a 150 lb person would burn about 1050 calories.

So, how can someone not doing anything burn 1750? I understand EPOC and

the raise in metabolism that happens post exercise, but at most, maybe

15-25% of REE.

So, if someones REE was 2000 calories which would be about 85 calories

an hour. And, they raised that 25% post exercise, they EE for that hour

would be 105 calories.

Thanks

jeff

[Guest guest]

Below is a recent study that suggests that a single bout of running

increases REE and fat oxidation for at least 24 h post-exercise,

maybe even 48 hours, if I read this abstract correctly? However, (if

I did my math correctly) it looks like the increase in REE is only

15.99 percent for 10 hours 8.9 percent after 48 hours. With a simple

average of those two that would yield 446 extra calories burned due

to the increase in REE.

You are correct that ½ pound fat loss is extremely

unlikely. But, it might be that the raise in REE lasts longer than

the hour and is much less than your generous 25 percent increase.

Maybe it's still a 25 percent increase for the first hour? That

data

was not measured in this study.

Thank you,

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?

cmd=Retrieve & db=pubmed & dopt=Abstract & list_uids=15205961

http://snipurl.com/7za3

--- In , " Jeff Novick " <jnovick@p...>

wrote:

>I understand EPOC and the raise in metabolism that happens post

exercise, but at most, maybe 15-25% of REE.

>

> So, if someones REE was 2000 calories which would be about 85

> calories an hour. And, they raised that 25% post exercise, they

> EE for that hour would be 105 calories.

> Thanks

> jeff

[Guest guest]

Right.

My problem with the article was it said that it would result in the loss of 1/2

pound of fat in just one hour.

The post exercise raise in REE has been shown to last from 30 minutes to 16

hours and sometimes more. And, I have seen it from 7% to 25%. One of the main

factors that influence how high the increase is and how long it will last is the

intensity of the exercise. The 25% was actually 24% and it was in one

study and was measured at the 3rd hour post exercise.

The recent study you just listed was based on running. The original article

was based on mild aerobics. So, the running article supports EPOC and what i

was saying, but not the original article.

I didnt " double check " your math, but if it is right, the 446 extra calories per

" day " would mean that it would take around 8 days to lose the extra pound of

fat. Eight days, not one hour. There was a recent study on some women that

showed after 2 years of working out regularly and combining some aerobics and

weight training they increase their REEs around 400 extra calories a day. So,

your math isnt far off from those numbers.

While I agree about the emerging information of fat, and the related hormones is

important to health, the math is the article was just wrong.

Regards

Jeff

________________________________

From: [mailto:scott@...]

Sent: Fri 7/23/2004 10:40 PM

Subject: [ ] Re: Leptin Update; (Was: intermittent fasting)

Below is a recent study that suggests that a single bout of running

increases REE and fat oxidation for at least 24 h post-exercise,

maybe even 48 hours, if I read this abstract correctly? However, (if

I did my math correctly) it looks like the increase in REE is only

15.99 percent for 10 hours 8.9 percent after 48 hours. With a simple

average of those two that would yield 446 extra calories burned due

to the increase in REE.

You are correct that ½ pound fat loss is extremely

unlikely. But, it might be that the raise in REE lasts longer than

the hour and is much less than your generous 25 percent increase.

Maybe it's still a 25 percent increase for the first hour? That

data

was not measured in this study.

Thank you,

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?

cmd=Retrieve & db=pubmed & dopt=Abstract & list_uids=15205961

http://snipurl.com/7za3

--- In , " Jeff Novick " <jnovick@p...>

wrote:

>I understand EPOC and the raise in metabolism that happens post

exercise, but at most, maybe 15-25% of REE.

>

> So, if someones REE was 2000 calories which would be about 85

> calories an hour. And, they raised that 25% post exercise, they

> EE for that hour would be 105 calories.

> Thanks

> jeff