When does a little magnesium lead to more?

I had been trying to use less magnesium, thinking maybe I had been taking too much of the chelated form. And I had been slowly getting worse. My pushup count was dropping to around 10 or fewer. My back was very shaky again.

Today, I doubled the dosage of the chelated magnesium, and started to feel a bit better fairly quickly. So, maybe my assumptions about increased absorption of chelated magnesium should not have lead to a conclusion that a lesser dose was needed. If I take two, I feel better and my pushup count is back up to 20.