I know I am supposed to refer to them as solutions, not concessions, but a chest strap is no solution.
At least not a good one.
Sure, it keeps me from planting my face in my food when I cough at dinner. But it comes at a high cost. It saps the strength that remains in my trunk. I have already traded much of it away for comfort and stability in my wheelchair back, which is shaped like a "U" that I sit in.
I saw a photo recently of my horseback-riding days. I wanted to cry at how straight I sat in the saddle and how I could not do it now.
Falling in my food, banging my head, and really, just about anything else is worth it to stave off the say I have no trunk strength.