Donovan said:Commencing an exercise program will not cause a drop in metabolic rate that
results in no weight loss at what was previously maintenance.
[...]
Quoted message said:Take a look at any textbook on exercise physiology. Commencing endurance
exercise programs in the absence of instruction to change caloric intake
results in weight loss.
But it's pretty silly that you ask me to provide evidence since your conjecture
is absurd on its face -- what you're saying is that basal metabolic rate is
reduced by exercise, which contradicts most known facts and most obvious
intuitions about the effects of exercise (e.g. afterburn, energy cost of
recovery, protein synthesis, etc).
The exercise physiology textbook section of my personal library is
rather scanty, and I'm not sufficiently fixated on this to spend hours
of research. I was rather hoping you'd do the research for me, then
report back saying "you're right, I'm wrong; a few more of those and
I'll be ready to concede your infallibility." ;-)
The notion that human bodies have a "starvation response" of reducing
metabolism in response to caloric deficits seems, AFAICT, widely
accepted - it's certainly widely spread by people who aren't obviously
crackpots, some of whom even sport credentials.
The notion that exercise increases metabolism is of course also widely
accepted.
Beyond that, it looks like it's gonna take more than ten minutes of
googling to become an expert on who the experts are and what their
research and opinions say about what happens when these factors collide
- i.e. exercise helping create the caloric deficit which induces this
metabolic slowdown.
Ten minutes of googling _is_ sufficient to find anecdotal reports
wherein people claim to have counted calories, exercised, and failed to
lose weight. Some claim to have finally lost weight after adding back
a few hundred daily calories.
For all we know, the OP may have been in a relatively "starvation"
equilibrium prior to the exercise routine, and her body's reaction is
just that much more hair-trigger.
Quoted message said:... intuitions about the effects of exercise (e.g. afterburn ...
Is that the same afterburn you characterized as "minimal" a few months
ago? http://tinyurl.com/9xodv
Hey, I'm no exercise / metabolism / weight loss guru, and unfortunately
I've never gotten myself organized to the point of truly tracking daily
calories vs. exercise vs. weight, but my personal experience as a
runner and an eater and a scale owner reflects a more complex dance of
variables than a dead simple model with a constant basal metabolism
etc. so that fat loss = (exercise kcal - delta dietary kcal) / 3500.
I know I know, Occam's Razor demands the simpler solution - that I and
anyone else with experience diverging from the beautifully simple
linear model are delusionsal. ;-)