cardio:
I donated blood this morning. I was told that I shouldn't do heavy lifting or strenuous exercise. I thought that I would be ok for karate since I didn't think it was strenuous enough. There was a second class for karate, but I had a slight headache at the start of it so I did a lot of nothing and took it easy. I think it was mainly because I didn't eat enough today. Between 1pm to 7pm is a long time to go without eating, especially when you had just donated blood earlier in the day. I usually don't donate blood on days that has karate and I purposely take a rest day off when I donate on other days.
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