HRV by Gender (IMAGE)

Sleep Number

HRV by Gender

Caption

Sleep Number data presented at SLEEP 2021 showed differences in overnight heart rate variability (HRV), as measured by standard deviation of normal-to-normal intervals (SDNN), between men and women throughout the week. Generally, weekend SDNN values were significantly higher than weekday values, suggesting that sleep may be more restorative in the absence of weekday stressors and time constraints. However, SDNN values for women followed a U-shaped pattern, starting high in the beginning of the week, dipping mid-week, then increasing through the weekend, whereas values for men followed an L-shaped pattern, starting high in the beginning of the week, but quickly fell and stayed low through the week.

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Sleep Number

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