The reason was twofold: to challenge myself, but also to prove my strength. While that hasn't entirely changed, I have made a few modifications. Lately, I've been opting to step rather than jump when given the option to "jump or step your way back to plank."
With this little change, I've also found that I no longer look down on the "easier" version of poses. Some days, easier is better.
The point is, no matter how small the change is, listening to your body can be a game changer. It can shift the way you see yourself and what you "have to do" in life or on the mat.
Have you had any revelations lately while on a run, laying on your yoga mat or spinning on the bike?
In the early days when I only ran alone, I used to say running was the cheapest therapy. And in a lot of ways, I still agree. Solo, uninterrupted time is much too sparse in our daily lives.