i was diagnosed with stage 4 COPD last june and put on oxygen almost 24 hours a day. immediately i started doing youtube breathing and upper body exercises. in march this year i started taking lowest dose magnesium. two weeks ago my oxygen level stopped dropping every time i stood up. my oxygen level has been staying in the 90s ever since. i have been off oxygen for two weeks. i give thanks first to the Good Lord, and St. Rita (stopped dropping on her feast day), then to exercises, then to magnesium pill. i still can't believe that i am not hooked up to oxygen. my pulmonologist said sometimes people get better. i am humbled by all of this. hoping telling what i did will help others. God Bless you all!