There is truth to the concept that regular daily writing exercises your writing muscle. Just like other muscles that build and grow and strengthen with regular use, so the writing muscle grows and strengthens with regular practice. Don’t ask me where the writing muscle is. It’s probably more like grooves in our brains. A piano teach once told me to practice fifteen minutes every day for maximum learning. This wears little grooves in the brain so it knows what to do. Like practicing the piano, learning to ride a bike, learning how to cook, the brain remembers and improves through regular practice. Usually we remember then how to do something. We improve with practice. I know. It has happened to me.
I'm a serious writer, meaning I have a regular daily writing habit, and I'm interested in sharing my work through publication. My favorite literary form is the novel. I write to entertain myself and my readers.