Why Is My Sleep Number HRV Missing or Suddenly Low?

Man reviewing a missing or low overnight HRV trend on a smartphone beside his bed

If your Sleep Number HRV is missing—or suddenly much lower than usual—it can be unsettling. The good news is that one unusual night is usually a signal to investigate, not a conclusion about your health. This guide walks through the most likely causes, the practical checks worth making, and when a persistent change deserves professional … Read more