How to avoid Alzheimer's

For goodness sake, is it meant to be a test? If you can spell it, you haven't got it? Anyway I digress, you want to know how to avoid it. (Alzheimer's is a very hard word; how do you spell it? IT.)

Steve stood up in church this morning. He said, 'Everybody stand up.' We obeyed - we're obedient like that in church. (Ha!) Then he said, 'Now stand on one leg, the leg you don't use to kick a football.'
Well, that could have been either leg in my case but I opted to stand on my left leg as I'm right-handed.
'There, nicely balanced?'
'Yes, Steve.'
'Now close your eyes.'
Whoooaaa. Instantly grab back of chair in front rather than person next to me who is falling in the other direction.

It's very strange. Steve compared it to faith. You can be pottering along, with everything going well, and your faith is fine; then you hit a black patch when life starts to fall apart. Suddenly faith seems to disappear. The good news is, in the case of standing on one leg with your eyes closed, that practice makes better. You can probably work out the analogy for yourself. But - and this is what I'm finally getting to - Steve said that, allegedly, standing on one leg (he didn't say if you had to have your eyes closed too but I guess you do) helps your brain in the fight against Alzheimer's.

So altogether now, let's ... what was it he said you had to do?
xx