Blair P. Houghton said:(Borrowed from this week's MRH thread.)
Bill said:If you are healthy you can't ride hard enough to hurt your heart. Your
legs
will quit going around and you will fall off first. ๐ If you are
grinning
I don't fall off. I work out, cool down, get off, stretch,
bending over, then when I stand up, I get very light-headed.
This has gotten worse the "fitter" I'm getting. I almost
actually keeled over this morning after a HIIT session on
a stationary bike.
I had my doctor check my blood a few weeks ago, and I'm
not anemic, with low but not abnormally low blood pressure.
I'm doing a lot of upper-body work mixed in with riding
(all spin-class bikes for the past month), so I don't
expect it's a problem of asymmetric fitness. More likely
the entire program is adding to it.
Anyone else getting this?
--Blair
"Well, I got blood in my head sometime.
That's for sure."
Yes, it happens to me after a hard ride and I have borderline high
blood pressure. 125/85 is about the normal for me but after a hard
ride in the heat this summer I almost passed out after getting off
the bike and then standing straight up. When I got home I measured
my blood pressure at 80/50 and was still feeling a bit light headed.
I think this group went around on this in the summer with something
called "Post exercise Hypotension.". It seems to be true since I
have had it happen to me more than once. At work (past tense) there
was a mountain that I would ride around at lunch time and I would
measure my blood pressure before and after the ride. This was
possible due to a sit down station at the local grocers. Before
attacking the mountain at lunch I was at 130/90 and 9 miles and
1,000 feet of climbing later I was down to 90/50. Small mountain,
but still a good lunch ride.
Sometimes I get to the point where I have to put my head between my
knees, bent over, and then stand up slowly to get the blood pressure
up to where I am not feeling faint.
If it was a heart problem I would have killed myself a long time ago
since I never worry about it but just go out and ride or run. Even the
fittest among us need some pressure to pump the blood to the brain.
I remember hearing of a racer who after a very hard mountain climb
passed out on the downhill and crashed his bike, breaking his leg.
I think you are healthy and that it happens to most of us if we work
out hard enough and long enough.
It could be dehydration if you are sweating a lot during the workout,
since I have personally been at that point a few times this summer.
For me, I drank to the point of having my stomach sloshing with
water but I was still dehydrated since I was sweating faster
than my stomach would absorb the water I drank.
Personal experiences, not advice.
Bill
--
bbaka