I've been typing since I was 5, and I am in my early 40s. I have not really noticed any degradation in typing speed ... though now I am self-conscious about it

I've been typing since I was 5, and I am in my early 40s. I have not really noticed any degradation in typing speed ... though now I am self-conscious about it, I am noticing something. Usually, when I type, my focus is on ordering the words I want to articulate, rather than the typing itself. I don't feel it is because my hands and fingers are getting less dexterous. I think my reflexes are just slowing down in general. I practice something similar to Tai Chi, and in the past year of so have changed and expanded the connective tissue in my hands, so that may be a part of it. Mostly though, it is more of a degradation of working memory for me. I've been taking Omega-3 DHA/EPA and Lion's Mane mushroom supplements for that.