"ChuckWWW" <[email hidden]> wrote in message
Quoted message said:I'm a NOOB. Just been running since the summer.
I get this groovy super-relaxed feeling maybe a couple of hours after
what is for me a longer run (say 5 miles or more). But the other thing
I noticed is that if I sit in a chair for a while, and then stand up,
WHOA, super dizzy spell! Does that mean I haven't properly replenished
my electrolytes? Low blood pressure, right?
Thanks in advance for any thoughts on the matter.
Maybe your resting HR is low. Mine is in the high 30's when in
race shape and about 40-42 average.
Ths phenomenon is sometimes called athlete's bradycardia. It's
similar in many ways to another, more serious problem known as
sinus bradycardia. The difference is that the latter is unexpected
and inappropriate for the physiology of the subject involved, and
more importantly is usually a sign of serious underlying problems,
sometimes with the thyroid gland and other times with blockages
of various types in the patient's blood flow. A pacemaker is often
an option for these people.
Both conditions are characterized by a resting heart rate of below
45-50bpm, and even below 40bpm in "exceptional" cases. My RHR
is about 38bpm when I wake up. As I am sitting here in the early
afternoon with a just-finished coffee in front of me after a morning of
weights, abdominal work and 30 minutes on a bike, it is 42bpm.
Dizziness when standing up too quickly is the most annoying part.
The heart is a muscle, just like your biceps or your hamstrings. And
like those muscles, it too gets bigger and more powerful as you work it.
You left ventricle increases in size and your stroke volume becomes
bigger. More blood is pumped with each beat. This is why it happens.
cheers,
--
David (in Hamilton, ON)
www.allfalldown.org
www.absolutelyaccurate.com