As a rule, Orthodox don't kneel on Sundays. Usually, weeknights during Lent you will see kneeling and prostrations. On a weekday liturgy (mass, always done in the morning) people will usually kneel at least for the Lord's Prayer (this is in the US)
Could you share your magnesium preparation and dose? If you are deficient in magnesium, the mechanism I would guess is that neck muscles are unable to relax and constrict the action of weaker muscles used for breathing.
The advertising industry is bad enough that it's not necessary to exaggerate by saying things like "dominates the entire world". Unless you do indeed mean that, in which case, how do you define it?