why am I getting this symptom after fast walking?

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I have been doing fast walking for the past 5 years, off and
on, to keep my weight down. However, instead of feeling
rejuvinated after the activity, I feel drained and barely
above sleeping. I have experimented with this symptom and
find that it only occurs if two things coincide- rapid heart
rate (above 175 bmp) and very fast walking, above 5 mph. If
I keep the hr in the 160's, I don't seem to have the
symptoms. One probably asks why I continue to go above the
aforementioned limits, but the result brings along another
benefit- I almost have to force myself to eat as my appetite
is totally drained. So, as a result, my weight stays off
(but I can only do this intense walking when my day's work
is completed or I can do nothing at work!). The big question
I have is, what's causing me to feel so weak and tired? I
drink plenty of water and tried to see if dehydration might
have been the cause, but the amount of water, even in
excess, doesn't change anything. Type II diabetes does run
in the family in males around age 40 (I'm 34 but have had
the symptoms of weakness since age 27). I have checked my
sugar quite a lot and don't seem to have it yet. However,
could my body, through genetics, somehow be thinking that it
has diabetes (like pre-diabetes)? I know it's pretty far
fetched, but I don't have a clue as to what causes my
weakness/ draining after intense walking.

Thanks in advance for any opinions.

Jason Able

It sounds to me like you are just plain overdoing it. Try
backing off a bit. Take rest days. Go slower or for
shorter distance.

There could also be some physical reason -- perhaps you
should have a checkup? bj

"Jason Able" <jable@bnon.com> wrote in message news:Y62Dc.1-
3700$bs4.10877@newsread3.news.atl.earthlink.net...
> I have been doing fast walking for the past 5 years, off
> and on, to keep
my
> weight down. However, instead of feeling rejuvinated after
> the activity,
I
> feel drained and barely above sleeping. I have
> experimented with this symptom and find that it only
> occurs if two things coincide- rapid heart rate (above 175
> bmp) and very fast walking, above 5 mph. If I keep the hr
> in the 160's, I don't seem to have the symptoms. One
> probably asks why I continue to go above the
> aforementioned limits, but the result brings
along
> another benefit- I almost have to force myself to eat as
> my appetite is totally drained. So, as a result, my weight
> stays off (but I can only do this intense walking when my
> day's work is completed or I can do nothing
at
> work!). The big question I have is, what's causing me to
> feel so weak and tired? I drink plenty of water and tried
> to see if dehydration might have been the cause, but the
> amount of water, even in excess, doesn't change anything.
> Type II diabetes does run in the family in males around
> age 40 (I'm 34 but have had the symptoms of weakness since
> age 27). I have
checked
> my sugar quite a lot and don't seem to have it yet.
> However, could my
body,
> through genetics, somehow be thinking that it has diabetes
> (like pre-diabetes)? I know it's pretty far fetched, but I
> don't have a clue as to what causes my weakness/ draining
> after intense walking.
>
> Thanks in advance for any opinions.
>
> Jason Able