One of the most thoughtfully written and nicely illustrated "how to" books I've seen in a long time, "The Stick And Cane In Close Combat: Jointlocks, Takedowns and Surprise Attacks" is about how to use a stick, staff or cane as leverage in grappling. It's a compendium of jointlocks and takedowns, basically, from the practical to the fanciful, with only passing reference to the short, sharp shot (the best way to fight with a stick is to hit somebody with it, usually.)A little knowledge of anatomy and physics is a *truly* dangerous thing. I am far from an expert martial artist, but Mr. Lang certainly is, and it appears to me that at least some of these techniques would remain completely accessible/available to older people who might have reduced strength, range of motion, or even balance.It turns out that Tom Lang is an instructional designer and medical/technical writer, in his day job. No wonder the book reads so well!
Jointlocks and Takedowns with the Stick and Cane (Tom Lang)