A few months ago, I did a little experiment to try to measure the impact of giving blood. Having donated before, I knew it would have some short-term effects, but I'd never tried to put some figures on it. In the week or so before I donated, I ran an eyeballs-out 5k, and also an interval session.
With these in the bag, I donated my blood, recording the whole process, and filmed my return to running. NB there's a very brief scene with a needle, if you're heavily squeamish; and a middle-aged man running to the point of exhaustion, if you like a good laugh.
There's more information on the NHS Blood and Transplant Service website or you can call 0300 123 23 23. If this video has inspired you to give blood, or even just to look into it - leave me a comment below. Please share this video with as many people as you can!