Sunday, January 27, 2008

cold is a relative thing

i never thought i would appreciate 60 and 70 degree weather so much, but man, this is amazing! i had heard a rumor that it was supposed to be nice this weekend, and when i woke up yesterday morning, the sun was shining and my room was really warm. so i threw on a tank top and some shorts to go out for a nice 20 miler. i opened the front the door and immediately re-thought my attire. i added a long sleeve shirt and some gloves because it was freezing outside. fifteen or so miles into the run though it started to get warmer, and after grabbing a quick bit to eat after my run, i busted out the gardening tools and spent more time outside. the nice weather has continued and it is another beautiful day today. my roommates and i are all sitting outside on the porches with our laptops "working." actually we are working in a way...just on our vitamin d deficiencies and not necessarily our homework.

on a cold related note though, i learned something interesting while doing some physiology reading for my biomedical engineering systems class. ever wonder why your fingers turn blue (or purple) when you get cold? you've probably heard it's due to poor circulation, but this explanation never told me exactly why my fingers turn the color they do when i get cold. the blue/purple color itself is due to deoxygenated blood hanging out in your finger tips and not getting pushed back to the heart due to the poor circulation mentioned earlier (explanations of poor circulation are another can of worms--or blood vessels--entirely).

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