Do you think running is like a short life?

there are certainly phases to a run. I feel excitement as I start then move on to the heavy legs phase which is really difficult to get past. But I do know I can get past it so I persevere then there is a thrill when I enjoy that next mile and feel like I can run forever. Then the tired heavy legs returns then I try to push through again to get to the amazing feeling I had before. I often have a hard time making myself push through this second phase of tiredness. Though when I do I feel an amazing sense of accomplishment. I think this is why they say that running is 90% mental 10% physical.

of course ,i think the biggest commn ground is there is nothing in the end and all we cat get are in the process. when we are running ,we are suffering but also enjoying.i like thinking my daily life when i was running,it is remind me keep active and happy.