Last summer, I went out for a run through my neighborhood. I made the mistakes of running too fast and running too long. So by the time I was finished, my heart was beating so hard that it was kind of scary! Since then, I've been more careful when I occasionally go out for a run.
Be careful not to get heart attack or simillar. Me pushing myself to the limits? Uh hard question. Sometimes when my boss calls me at 2 am when Im deeply asleep and he asks me to come to work
Its quite lenghty walk .... over 10 miles Sometimes when our neighbours go for holidays, they ask me if I can take care of their dog - its Bernese Mountain Dog (=> http://en.wikipedia.org/wiki/Bernese_Mountain_Dog) so it needs very long walks (10-15 miles).
I actually find that, for me anyway, walking ten miles in one day is easier than running for a quarter mile. I can't run very far. But I can walk long distances.
Same here, I can walk for miles and not feel tired, but if I run for a long time, then I'll sleep for ages. I love running/jogging on the elipitical though.