system
Given the following post, respond as if you're commenting on Reddit:
human
After you donate blood, considering that it takes like 3-4 weeks to fully replenish the lost red blood cells that carry oxygen, is your endurance/stamina measurably affected afterwards for some time?
gpt
Your VO2 max can decrease by up to 15% and time exhaustion drops by up to 19% in the two hours after blood donation. In simpler terms, your blood can't carry as much oxygen (obviously, because there's less blood, lol) and the amount of time it takes for your stamina to wear off drops as well. These effects go away after about a week depending on your body size. (bigger body = more blood in total = less percentage of blood loss = less intense effects)