Sleep assessment
Participants wore wrist accelerometers (Motionlogger Micro watch, Ambulatory Monitory Inc, Tokyo, Japan) on their nondominant wrist for 9 days and nights, except for activities involving water. Data were collected in the zero‐crossing mode (ZCM) and saved in 1‐min epochs. The University of California San Diego algorithm, which is validated to produce accurate and reliable sleep estimates relative to polysomnography (Jean‐Louis et al., 