Running is hard. Hard to quite once you've figured out all the right stretches and techniques that work for your body. If pain comes, there is a reason and usually a way to adjust to make it pain free. Running is literally one step at a time for progress and the only way to enjoy it more is to run more. Every race a celebration, every new goal achieved a boost to your health and inner strength.
When I started running I barely could last 5 minutes. Little by little that grew and expanded and the first time I ran for 10 minutes I was ecstatic. When I ran my first mile (as 38 year old adult), I was besides myself with pride over that accomplishment. The first 5K run I ran it certainly felt like the first Siyum I had for completing the first volume of Talmud, Masechet Brachot. What had been so unattainable, now was done. Doing it again was now an option.
The first time I had face bad weather during my scheduled run time I actually heard myself say, "When you didn't think you had time for Daf Yomi and you made time, you were always glad you did...so go out and run and you'll be glad you did." And it only took once of saying that to know I was right. At some point I actually took extra joy in running on extremely cold days, or at odd hours of the night, or during heavy rain. There were no excuses. I actually wanted to be running when I was planning on running regardless of the other obstacles.
At some point, the long runs kept getting longer and longer and by happen-chance a friend asked me, "So when's the marathon?" Had you asked me if I would ever run a marathon before I had managed to run for longer than 5 minutes, it would have been such a laughable question it would only have resulted in joke after joke about achieving the impossible. I ended up running my first marathon a few days before my 1 year anniversary of starting to run.
Likewise, had you asked me if I was going to study Talmud prior to having completed my first Siyum of learning from the first volume, I would have been so overwhelmed at the largess of the task that it wouldn't have had any answer of value. But day by day, page by page, volume by volume I did study Talmud. Right on schedule with the rest of the world, I completed Daf Yomi excited and proud of an accomplishment that taken from a wide angle lens is overwhelming, but approached day by day is only 1 page to focus on.
The discipline it took to study Daf Yomi is the same discipline it takes to run.
The discipline it takes to run, is the same discipline it takes to study.
However you come at it, from whichever angle, the largess of either is simply a collection of small accomplishments.
Go learn/run