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PRODID:Linklings LLC
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TZID:America/Chicago
X-LIC-LOCATION:America/Chicago
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DTSTART:19700308T020000
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DTSTART:19701101T020000
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BEGIN:VEVENT
DTSTAMP:20251016T135141Z
LOCATION:Grand Hall I
DTSTART;TZID=America/Chicago:20251016T113000
DTEND;TZID=America/Chicago:20251016T115000
UID:HFESAM_ASPIRE 2025_sess280_LECT186@linklings.com
SUMMARY:Pulse Rate Variability From Wearable Wristwatches as a Surrogate f
 or Heart Rate Variability? We Think Not Yet
DESCRIPTION:Aditya Shanghavi, Jeevan Jayasuriya, Yuxin Cai, and Ranjana Me
 hta (University of Wisconsin - Madison)\n\nHeart rate variability (HRV), d
 erived from ECG, is a validated biomarker of fatigue, but its application 
 in real-world settings is limited by cumbersome hardware. Pulse rate varia
 bility (PRV) from photoplethysmography (PPG) offers a promising alternativ
 e, especially using wrist-worn devices. However, PRV is susceptible to mot
 ion artifacts and physiological confounds, raising concerns about its reli
 ability. This study evaluated PRV-HRV agreement across 13 sensorimotor tas
 ks, varying across ambulatory conditions as well as physical and cognitive
  task demands using Empatica’s EmbracePlus (PPG) and Actiheart (ECG). Look
 ing in both in pre- and post fatigue states, significant HRV-PRV differenc
 es were observed in 85% of tasks with very low correlation across all task
 s. Only two physically demanding obstacle-walk tasks showed non-significan
 t differences, suggesting transient alignment under high sympathetic activ
 ation and arterial stiffening. Overall, PRV underestimated variability, pa
 rticularly during stationary and seated conditions, with motion artifacts 
 likely degrading signal quality. These findings emphasize the need for cau
 tious interpretation of smartwatch-derived PRV in applied contexts. Improv
 ed artifact reduction, advanced denoising algorithms, and exploration of s
 pectral-domain metrics are necessary before PRV can reliably substitute HR
 V in fatigue and performance assessments.\n\nTrack: Usability and System E
 valuation\n\nSession Chair: Michelle Rusch (Iowa State University)\n\n
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