As a teenager I was very active in sports, but running was always extremely hard for me, especially respiratory function. After taking 2 low dose aspirins, I have discovered I can jump on my treadmill and run for 30- 45 minutes and there is hardly any respiratory distress. I can talk, and it feels great. However, I bruise really easily now, is there any other danger with the asprin, I feel so much better and really don't care about the bruising. Anything I should know- and how does thick blood affect the ability to lose weight? I am 47, 5'6" tall and 248, down from 265.