weightlifting hangover

. a reason for weightlifting hangover is that
while an extreme amount of exercise can replace insulin's function,
conversely, it may tend to temporarily decrease insulin sensitivity;
ie, insulin is spurring the cells a bit,
and then after exercise spurrs the cells a lot,
insulin's kick just isn't noticed as much .
. that may be yet another reason why stretching is magic:
not only does it do more ripping an damage that requires growth,
it also involves on-going exercise -- more cellular spurring .
. conversely,
perhaps any vigorous aerobics after weightlifting
might be a replacement for stretching?