Get a comprehensive performance score across cognitive, physical, emotional, and social dimensions — all driven by your sleep data.
Performance isn't a single variable — it spans cognitive, physical, emotional, and interpersonal domains, each of which is distinctly affected by sleep. Understanding which dimensions are most impacted by your current sleep pattern helps you prioritize where to be most careful today.
Physical performance shows some of the clearest sleep-dose-response relationships. Cheri Mah's Stanford research showed athletes extending sleep to 9–10 hours improved sprint times, reaction times, and accuracy significantly. Conversely, one night of 5 hours reduces maximal strength output by 20%, aerobic capacity by 10–15%, and substantially impairs pain tolerance and injury risk perception.
Emotional regulation — the ability to manage emotional responses and maintain social composure — is among the most severely impacted by sleep loss. The amygdala (emotional reactivity center) shows 60% greater response to negative stimuli after one night of sleep deprivation. Sleep-deprived people report more interpersonal conflict, worse empathy ratings, and significantly reduced social engagement quality.