Before I was diagnosed with sleep apnea, I often woke up tired and not knowing the cause. So, instead of focusing on the cause, I worked on counteracting the effects of my tiredness. I started using oxygen in small doses as soon as I woke up. This was quite effective at relaxing me and helping me to focus. I am sure you know the saying “too much of a good thing is bad for you” and in this case it is quite true. You can use too much oxygen and poison your body, so consult a physician before you try this. Oxygen machines or small oxygen canisters can be easily purchased online. The other way to increase oxygen to your brain is to do an exercise that resembles a windmill. You stand and bend at the waist so that your head is parallel with the floor. Then you rotate both of your arms at a high rate of speed. Be sure to focus on deep breathing and do NOT hold your breath as you do this exercise.
image: kikums, etsy.com