Now don't go getting all reactionary on us Joe!
Surely it's better to endlessly discuss the text, the syntax, the punctuation and the typeface of the complicated words than to do something as daft as getting onto the mat and working it out there!
i would suggest that sitting for hours clutching a dictionary, Physics /Maths books would be less tiring physically than doing a hard session at the dojo.Armchair Aikido is really good. My own reading is limited to the Dandy, the Beano , Batman and a well thumbed 1957 copy of Health and Efficiency.The last book is read avidly for purely educational purposes only!!