Serene Vannoy wrote:
[Question is: How often have you muttered (to yourself and/or
nobody in particular) 'I need to go on a diet' (to lose some weight)?]
I don't mutter/think the above phrase to myself. Since entering middle
age, I have believed on an ongoing basis that my optimal weight is
somewhat lower than it often is, but I do not oscillate between
saying "I need to diet" with intervals of just ignoring my weight.
I give it a more or less constant, pretty much background level of
attention. I'm also a believer that information never subtracts
from decision making, so I measure my weight, my body fat percentage,
and the amount of calories and macronutrients I am consuming quite
frequently.
(And I have altered my diet at times in response to specific medical
information, e.g. high lipid levels, gout, hypertension, slightly high
glucose, but that is straying from the topic.)
I agree the evidence is completely there that easily 90% - 95% of diet
attempts fail. Possibly more than 95%.
What I haven't been able to find out is what fraction of people
succeed in deliberate weight loss, using the consensus definition
of this phrase [1]. I believe it to be 20% to 30% of individuals
who have tried, after much reading of the available data, but
have not found any studies that conclude with a figure for
exactly this. (You'd hope there would be not just studies,
but meta-studies, but AFAIK it's not there, which I think points
to the pisspoor state of science in this area.)
Steve
[1] An individual has succeeded at weight loss if they are
below their peak weight, have been below their peak weight
for five or more years, and have engaged in deliberate weight
loss during this time; persons with a medical condition
that is causing weight loss are excluded.