Writing = fitness training?

Writing is like fitness training, which requires persistence, perseverance, determination and motivation. I personally believe that the more you train (in terms of writing), the fitter (the more eloquent) you'll become. However, I'm extremely "unfit" at the moment because I haven't been "training" (my writing) for a while. Consequently, I'm feeling uncertain with my writing and often I need to revise a sentence multiple times before feeling content with it. I did try to write (a blog) daily, but failed to sustain this endeavour because of the lacking of motivation and determination. I do write momentarily, such as writing this blog right now, but this is not a good training approach because I'll never achieve the optimal performance. From today onwards, I need to get back to my writing training. I must set aside 10 minutes for writing, regardless the content of it. Eloquent writing develops from constant training and perseverance because writing is never a straightforward but an iterative process. It commences with drafting (accounting), revising, and expanding (elaborating) and the goes back to revising and so forth. Writing can be a never-ending process especially if you're aiming for perfection.  There are so many different ways to express an identical idea.