Good question, Tom. The answer is no because sitting down takes the legs out of the swing and forces one has to generate all the power with the upper body.
I have written in earlier posts about how weak I feel if I address the ball in my pre-Blake position ie late 1960's. I feel deprived of the powerful motor of the legs which drive the swing effortlessly.
Need a free spelling checker add-on for Internet Explorer ? ieSpell ;After installing, just Right-Click on your message word and select Check Spelling. BobKy.