Subject: How can hypoglycemia occur in healthy people?

I was wondering: many people complain about "hypoglycemia" when they feel tired etc. - but, if you're 
healthy, shouldn't your body be able to compensate for energy consumption? Ok, if you exercise 
vigorously (as in: iron man style) etc. I can understand that consumption exceeds synthesis capability 
from glycogen / fat, but during "normal" activity that shouldn't happen, cause that's what your body fat 
and liver glycogen is for, right ? Or am I missing something here?

Re: How can hypoglycemia occur in healthy people?