Training with less blood

**guvnor** · 8th March 2006

I am giving blood at work tommorow (1pm)
I also teach a boxing circuit training class at 6.30 which is very intensive.
Who here has given blood and did you feel weak after and for how long?

guv

**flumperino** · 8th March 2006

Well, one time I gave blood...I kinda forgot, then drank 6 pints of stella in the evening.

I did not feel good the next day

**Deadly** · 8th March 2006

I guess your best asking the nurse before you give the blood, can always cancel it and do it some other time if you really need to make the boxing class.

edit: found this

It is important to be aware that some donors feel faint after giving blood. During blood donation 8-10% of the blood volume is removed. Most people adapt quickly to this loss and their system is not upset by it, but a few individuals adapt less well and consequently feel faint. We hope this will help explain why some donors feel faint after giving blood.

The effects of blood donation are aggravated by various factors.

People who weigh less than 7st 121bs (50kg) are more likely to faint if they give blood because they lose relatively more of their blood volume than larger people. Therefore we advise them not to donate, in the interests of their own health and well-being.

People who smoke soon after giving blood are more likely to feel faint because of the effects of nicotine.

People who take alcohol within a few hours of giving blood are more likely to feel faint because alcohol dilates the blood vessels. This causes less blood to be available to circulate to the brain leading to dizziness and fainting.

Being in a hot room also causes the blood vessels to dilate and thus has a similar effect to alcohol.

Rushing about, or vigorous exercise can also produce similar effects.

Missing meals and not replacing fluids means a delay in the recovery from blood donation.

Standing still for long periods of time can lead to pooling of blood in the legs, a situation similar to soldiers on parade. This reduces the amount of blood available to the brain.

If you rush about, miss a meal, have a 'liquid lunch', a cigarette, or get overheated you may feel faint even if it is several hours since you gave blood.

Follow the advice about resting after your donation

Take plenty of fluid

Do not smoke or drink alcohol within 2 hours of giving blood

Avoid rushing around, prolonged standing, hot environments, or vigorous exercise

With these general measures donors can minimise the chances of fainting.

**Andy Poobar** · 8th March 2006

you will feel week if you do any physical exercise.

Basically, your body needs the blood to take the oxygen from your lungs to your muscles and you have just takes about an eighth of it away so you will get very tired very easily.

Hope that helps

**flanflinger** · 8th March 2006

Originally Posted by flumperino

Well, one time I gave blood...I kinda forgot, then drank 6 pints of stella in the evening.

I did not feel good the next day

ha ha ha ha that reminds me of when I worked for city and the breaky crew went to give blood all of us did and we felt great... Micko69 met Disco and off me toddled to have a monster sesh... and yes I felt pissed after about half the usual and the next morning when I had to be on air at 06.00 .... Disco was stuck to his bed