Your question is lent new meaning in light of this Covid-19 pandemic! I know I now pray differently because of the danger to human life even in the very act of breathing.
Years earlier, I learned to pray differently with regard to my heart-beat after I suffered a heart-attack that damaged my heart moderately. I could have died but for medical interventions. Thereafter, I acknowledged to God in prayer that my every heart-beat was dependent on him. Ecclesiastes 3 states that "there is a time to be born and a time to die" (vs. 2). Chapter 7 warns us not to be over-righteous or over-wise: "Why destroy yourself? Do not be over-wicked and do not be a fool - why die before your time?" (vs.s 16-17) And the Psalmist acknowledge that God knew everything about him even while he was forming in the womb, adding, "All the days ordained for me were written in your book before one of them came to be" (Ps. 139:13-16).
Due to surviving that heart attack, my theme text is, "My flesh and my heart fail, but God is the strength of my heart and my portion for ever" (Psalm 73:26).
Beyond the physical level which billions of people seem to take for granted (till death threatens), there is a spiritual level at which God needs to be acknowledged for our next breath and our next heartbeat. That is why Jesus gave the parable of the successful farmer planning to tear down his old barns to replace them with much bigger ones. Jesus called that foolish, because "that very night your life is required of you" - required by God, who gave it in the first place (Luke 12:15-21). The parable was to show the folly of storing up things for oneself, to garner even more in the future, without being rich towards God who gives us everything. He is to be acknowledged in all our ways.
As for our next breath, well, would you consider God's role in breathing if you knew your next breath would contain a potentially lethal virus that would get into your lungs? We all know that there is no immunity against Covid-19 just because a person believes in God and even prays regularly to God. Believers suffer much the same trials and sufferings in life as do non-believers. Christians certainly should not pray superstitiously as if they could call upon God to keep the virus out of the air they breathe. But they could (and, I suggest, they should) pray privately to acknowledge their Maker as the one who is sovereign over their next breath and their next heartbeat. We should not take it for granted that God will keep us breathing and living because none of us know when our time will come. But we know that whenever God allows our lungs and/or our heart to terminally fail, those who have acknowledged him in all their ways will even have their steps into death directed from above, for it will be God's time for us to depart this earthly scene.
Paul certainly knew all those O.T. scriptures I quoted, including this warning to Belshazzar: "And the God in whose hand thy breath is, and whose are all thy ways, thou hast not glorified" (Daniel 5:23). That night God ensured he breathed his last. Paul would also have know of that particular parable of Jesus, so I think his reference in Acts 17:28 credited God as the ultimate sustainer of our lives, even down to our very breathing and heartbeat. Further, he would appreciate that his educated audience would understand what he meant – the level at which God gives us life.