Quick tip

Runner's World (UK) - - Fitness -

Run­ners who give blood should time their do­na­tions care­fully. The av­er­age amount of blood taken (400-500ml) tem­po­rar­ily re­duces haemoglobin lev­els, VO2 max and ex­er­cise ca­pac­ity. This lasts around 48 hours and in that time it could af­fect your per­for­mance in any races or train­ing ses­sions.

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