Python Metabolism and Weight data

Fri 22 December 2023 Python python / diet / weight / samsung health / withings

Overview

• installation: see https://arrizza.com/setup-common

Summary

This project is to gather and aggregate data about activity and weight.

Get raw data

Withings Body+ scale

• Login to Withings Login
• click on Support in the menubar
• enter "export data"
• click on "Privacy - How can I export my data?"
• click on the provided link "... all of your data at once by clicking this link"
• click "Start my archive"
• After a few minutes, you will get an email with a link
• download the zip file into ~/Downloads
• extract the data
• copy these files to metabolism-weight/data
  • weight.csv

The weight.csv should have the following columns:

• Date
• Weight (lb)
• Fat mass (lb)
• Bone mass (lb)
• Muscle mass (lb)
• Hydration (lb)
• Comments

Samsung Galaxy 4 Watch

• on your phone, go to Samsung Health
• go to settings
• scroll to "Download personal data", click it
• download the data to your phone
• plug your phone to your PC via USB-C
• On "allow access to phone data?" click Allow
• The phone data should not be mounted on your PC
• go to Internal Storage/Download/Samsung Health
• there should be a "samsunghealth_smartthings_"
• copy these files from folder to metabolism-weight/data (note: very slow!)
  • com.samsung.shealth.activity.day_summary.
  • com.samsung.shealth.calories_burned.details.

Run

./doit
./doit --verbose     # to see the daily data
./doit --year 2025   # only load data for the given year; defaults to 2024
./doit --year all    # load all data

Typical Output:

<snip>
 40 2024-10-06 Sun  62,059   4,661  221.4   75.6  138.5 
 41 2024-10-13 Sun  75,023   6,811  221.2   71.8  142.0 
 42 2024-10-20 Sun  77,305   5,733  221.0   71.7  141.9 
 43 2024-10-27 Sun  59,554   3,688  221.7   71.3  143.0 
 Total steps   :  3,038,807
 Total calories:    216,647

The columns are:

• week number: from 1 to 53 (see isocalendar())
• date: this is weekly summary so it will be on Sundays
• steps: the number of steps for the week
• calories: the number of calories reported by Samsung Galaxy for the week; It takes 13 - 15 steps per calorie.
• weight: the value reported by the Withings Scale, in this case pounds
• fat: the value reported by the Withings Scale, in this case pounds
• muscle: the value reported by the Withings Scale, in this case pounds

This shows that in the last 4 weeks, I've lost 4 pounds of fat and added 4 pounds of muscle, which results in no weight gain or loss. In the 10 months from Jan 1 to end of October I've walked 3 million steps and burnt over 216,000 calories.

Note the weight, fat and muscle values are an average of values for the week.