So I've been lurking here a week or so and heard of Lyle McDonald, so I've been reading up on his articles for most of the evening and I've had a scary thought.
Firstly I was reading his "Setting the Deficit" article where he detailed the pros and cons of a small, medium and large deficit and on the large, one of the cons was:
That led me to look around the site for permanent metabolic changes and any info relating to it and I came across a Q&A where the guy asked:"Of course, metabolically, large deficit dieting can have the biggest impact on metabolic parameters. But that’s the price to pay for faster rates of fat loss."
Unfortunately Lyle McDonald admitted to having no expertise in eating disorders, but gave this answer anyway:"I suppose a follow-up question to this answer is just how rare it would be to cross a true “point of no return” where you may have fouled up your internal physiology to where it may never be able to rebound. Or is it usually a case of time and reversing some of the actions that cause it in the first place? i.e. the longer and more extreme the descent, the longer it will take to recover, but recovery is entirely possible."
For example, if nothing else we can see massive differences in the nutritional intake of a dieting bodybuilder/physique competitor (typically based around high protein intakes and ‘healthy’ foods) as opposed to the near complete absence of food in the anorexic or the alternation of binging and purging in the bulimic."First let me say that I am not and do not claim to be any sort of expert on the topic of eating disorders. It’s simply not been a major area of interest of mine. I think it’s worth considering that what is going on in something like anorexia or bulimia is quite different than what is going on with the topic I was primarily addressing in the original Q&A, to wit contest diets in bodybuilders/physique athletes.
With that said, what little literature I have looked at in terms of recovery from eating disorders doesn’t lead me to believe that there is any sort of permanent damage. So long as a ‘normal’ weight is regained (here we’re typically looking at the anorexic), things come more or less back to normal. Even in the seminal Minnesota study, metabolic rate eventually rebounded to normal; of course the subjects had regained all of the fat they had lost as well for that to occur.
But again, this is really outside of my major sphere of interest; if anyone reading this has expertise that can contribute to this question, I think we’d all love to see it."
So I'm wondering if anyone can clear this up.
I'll add the reason for my fears:
Back when I was 14, I decided one day that I was sick of being the fat kid (and I mean really fat) and ate just a bowl of Special K and a small meal (mostly around 600 cals, some days just a sandwich though) each day and lost like 40lbs in 4 months. At 18, I ballooned back to my old weight and did the same approach at 22, lost all the weight again and guess what? At 23 I put the weight back on again and now at 24 I fear I have a mangled metabolism.
Anyone on the forum possess this area of expertise to confirm or deny my fears?
Thread: Permanent metabolic damage?