(in progress)

What makes me nap during the day?

In 2016, in order to keep up with school work and study for the secondary school national examinations, I forced myself to sleep less than 6.5 hours a day. Despite trying to sleep more in high school and college, I realized that I would always wake up at around the 6-hour mark. Even if I managed to sleep 7 hours or more, I always woke up feeling more exhausted than the day before; since I had control over my time, this sleepiness also led me to nap during the day.

I finally got a smartwatch in January 2024 to investigate. This repository contains my analysis, visualization, and interpretation of my sleep data using Python.

Data Description

data/shr_v_temp_phase.csv

Heart rate (HR), Heart rate variability (HRV)

I've worn my Samsung Galaxy Watch 6 every night since I got it in January 2024. However, it wasn't until the Samsung Health app introduced "energy scores" on December 17, 2024 that I got easy access to my sleeping HR and HRV data.

Period & Basal Body Temperature data

I only have basal body temperature data from August 2024, and I used Samsung Health's ovulation predictions and manually-tracked period dates to determine the menstrual cycle phase for each day (follicular VS luteal).

data/daytime_naps.csv

Contains the daytime nap sessions: sleep sessions that 1) start between 6am and 6pm, and 2) last for more than 30mins), recorded by Samsung Galazy Watch 6.

data/nighttime_sleep.csv

Contains the nighttime sleep sessions recorded by Samsung Galazy Watch 6.