So I am a bit of an alcoholic these days but I always run 2 times a week. The thing that bothers me is that I see these people running and running but they never seem to break a sweat. And it seems like they running pretty vigorously. So I have a routine where I run a 9min mile and than put the incline to max and run as long as I can which is usually only about 2 mins. Then I speedrope until I basically break down. I figure I am just a glutten for punishment since I can never run without breaking a serious sweat. It's just not possible for me. Do I have shitty cardio or am I just pushing myself too much?