My boss has this, he is 35 and not fat at all. His father died from heart attack when he was young. Poor sleep (more like never enough), for some probably unrel

My boss has this, he is 35 and not fat at all. His father died from heart attack when he was young. Poor sleep (more like never enough), for some probably unrelated reason got much worse during covid. Always a bit tired, always subpar with physical workouts, but never as extreme as falling asleep when you don't want to. Mentally working on maybe 50%, but he is super smart so still plenty of room. He snored according to his exwife. He went for tests, first time doctors thought machine was broken, his readings on apnea were off the charts. Second test confirmed it. Worst case they had seen, now has machine for sleeping and feels 100% better on everything. He believes his father had the same and its what killed him. Internal organs getting hammered over years, especially heart.