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Blood taken. should i ride?

Old 09-08-07, 11:02 AM
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mtnbk3000
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Blood taken. should i ride?

i had three viles of blood taken this morning would it be bad idea to go for a ride, it is easily 85 degrees. it would be on the road for three miles, lots of sun then a couple hours in the trails, then ride back in the sun. what do you think.
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Old 09-08-07, 11:34 AM
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If you'd donated blood, and were down a pint, you might have some cause for concern, but the milliliters needed to fill those vile vials would hardly be a problem. You might lose more blood than that crashing and scraping your knees.
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Old 09-08-07, 11:35 AM
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i once had 5 viles taken and had trouble for the whole day after excersizing
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Old 09-08-07, 11:45 AM
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I would think that a slow ride wouldnt be too bad, but I wouldnt recommend any hard riding.

FWIW, I donate 690ml of plasma twice a week and ride the 5 miles home from the center with no problem, and thats after 8 hours of construction work. But then again, taking of whole blood is alot more rough on your body then just plasma.
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Old 09-08-07, 11:46 AM
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Originally Posted by MyBikeGotStolen View Post
I would think that a slow ride wouldnt be too bad, but I wouldnt recommend any hard riding.

FWIW, I donate 690ml of plasma twice a week and ride the 5 miles home from the center with no problem, and thats after 8 hours of construction work. But then again, taking of whole blood is alot more rough on your body then just plasma.
thats awsome that you donate twice a week!
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Old 09-08-07, 12:02 PM
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Go ride but stay hydrated. Blood loss from clinical laboratory phlebotomies (blood drawings) are not significant unless you are an infant, young child, or in the hospital for an extended time with lots of tests. Donating blood, however, is a much larger loss.

The average adult blood volume is 5 liters or 5,000 milliliters (ml). The typical blood volume drawn per specimen tube (vial) is only 5 to 10 ml (blood cultures are an exception, larger volume). Thus 3 specimens are at most 30 ml or 30 / 5000 = 0.006 = 0.6% of your blood volume or more importantly the red blood cell volume. The fluid volume is rapidly replaced so your blood volume is soon the same, just 0.6% fewer red blood cells to transport oxygen. You will not notice this physiologically.

However, 85 deg plus whatever the humidity would be my concern, blood samples or not. Stay hydrated including enough salt to keep your sodium up. One good measure is drink enough so you need to urinate periodicaly.
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Old 09-08-07, 12:09 PM
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One time doing asbestos removal I saw a guy slash his arm with a metabo, spray blood all over the place, and return to work later that day. Sometimes you gotta buck up.
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Old 09-08-07, 12:12 PM
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thats pretty crazy. i thing is i already have trouble hydrating, i will go out with 3 liters of water for three hours, come back later shirt, bandana, helmet, pants, everything soking wet, and still have a liter of water left. then the headache comes. I guess i just have to hyrdrate better during the way.
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Old 09-08-07, 12:14 PM
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Do you make sure to get proper sodium? That might be what causes your headaches.
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Old 09-08-07, 12:20 PM
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Originally Posted by mtnbk3000 View Post
thing is i already have trouble hydrating
You want something in the water to make it absorb faster. You can try drinks like
Cytomax or Accelerade. They work quite well.

You can take Gatorade or Powerade and mix them half strength. Then throw in a
few grains of Lite Salt.

If you take 3 bottles out, make one of them some sort of exercise drink. After the
first bottle of water is gone; start in on the drink.

You can get potassium tablets from Walmart for less than 2 bucks. I keep some on the bike. If it's really hot I take about one an hour in addition to the drinks mentioned.
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Old 09-08-07, 12:25 PM
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Originally Posted by Michigander View Post
Do you make sure to get proper sodium? That might be what causes your headaches.
no! how do i go about doing that
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Old 09-08-07, 12:26 PM
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Acute hyponatremia is no joke and can be severe enough in long distance runners, triathelons, etc to need hospitalization. It was the subject of a NY Times article a few months ago. On a bike you may not be aware how much fluid you lose because it evaporates relatively quickly at our speeds compared to running.
"... Symptoms range from mild anorexia, headache, and muscle cramps, to significant alteration in mental status including obtundation, coma, or status epilepticus..." from eMedicine article on Hyponatremia
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Old 09-08-07, 12:28 PM
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so bassically take salt with me?
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Old 09-08-07, 12:35 PM
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Originally Posted by mtnbk3000 View Post
so bassically take salt with me?
No
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Old 09-08-07, 12:36 PM
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Originally Posted by late View Post
No
it has to be mixed into a drink
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Old 09-08-07, 12:37 PM
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Preventing exercise induced hyponatremia

Read this entire medical article on Exercise-induced hyponatremia: Causes, risks, prevention, and management. You can drink too much water if that is all you drink. From the above reference (and go to link to see Table 1):
"... Table 1 provides recommendations
for optimizing fluid balance.

‘Sports drinks’ and sodium content of fluids
For athletes participating in intense exercise
for more than 1 hour (eg, marathon runners),
beverages containing carbohydrates in concentrations
of 4% to 8% (ie, “sports drinks”)
are recommended. During exercise, consumption
of sports drinks containing carbohydrates
and electrolytes will provide fuel for
the muscles, help maintain blood glucose and
the thirst mechanism, and decrease the risk
of hyponatremia.
Including sodium in the fluid replacement
beverage in amounts from 0.5 to 0.7 g/L is
also recommended for exercise sessions lasting
more than 1 hour, since sodium may drive
the thirst center (however, this amount of
sodium generally exceeds that found in commercial
sports drinks). If the fluid contains
sodium, it could help avoid reduced serum
sodium levels and thereby lower the risk of
hyponatremia. Restricting fluid intake so that
it does not surpass sweat loss can also lower
the risk of hyponatremia. Runners should
sporadically check their body weight before
and after training runs to determine their
ideal rate of hydration."
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Old 09-08-07, 12:38 PM
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should i ride?
no. you should drink.
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Old 09-08-07, 12:39 PM
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so basically you want a sports drink with 4-8% carbs, and less sodium than a normal one has
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Old 09-08-07, 12:50 PM
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Which is why I suggested you use Gatorade or Powerade (the cheapest and most readily available ones) at half strength with just a couple grains of lite salt for the potassium..
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Old 09-08-07, 01:27 PM
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You should go drink some blood just to be on the safe side.
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Old 09-08-07, 01:57 PM
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I always ride home when I give blood. I've never felt faint, but I suppose if I did, I would wait a while before hopping on the bike. They say not to do any strenuous activity, so I just take it easy. I figure since I do the same ride every day, my body's used to it anyway. I'd probably feel worse if I didn't ride...
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Old 09-08-07, 05:27 PM
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Thus 3 specimens are at most 30 ml or 30 / 5000 = 0.006 = 0.6% of your blood volume or more importantly the red blood cell volume.
For anyone not metrically inclined, that's just about one fluid ounce. If one ounce of blood makes a difference to a person, that person's health is in such a precarious condition that he should stay away from bikes altogether.
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Old 09-08-07, 07:27 PM
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I ride too and from the plebotomist all the time, ain't no biggie.
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Old 09-08-07, 07:37 PM
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As already said, the amount taken is minimal. Hydrate well before, during and after. Here in Canada, the blood service agency provides juice/coffee/snacks after one donates a pint. (I always load up on the free Oreos ) Snacks and liquids in themselve gives one a good start.

FWIW, during my running days 20 years ago, after work one day I ran my regular 4k circuit. But for some reason, I just couldn't seem to get into my groove. Only during my cool downs did I remember that I donated earlier that day. It didn't kill me....
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Old 09-08-07, 07:48 PM
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i didn't go riding anyways, i was just about to leave and my parents asked if i was going to see 3:10 to yuma with them, and after we went to dinner, no ride today, maybe tomorrow. By the way the movie was pretty good.
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