I've been experiencing muscle and joint pain since 2009. Since December 2015, I've been following:
-the intensity of pain in different body regions
-the number of steps and calories I burn every day (with a fitbit)
-the physical activities I do
-the time I spend on my computer (with a software called ManicTime)
-the number of key press and mouse clicks I make (with a software called WhatPulse)
The main objective is to create an algorithm that takes as an input the activities and pain intensities recorded up to a certain day and gives as an output a recommendation about what activities should be performed or avoided on that given day to avoid having symptoms increase. The validity of this algorithm should be access by using the symptoms recorded for that day.
From personal experience it seems very likely that the intensity of symptoms and the activities performed are correlated. As shown below, simple visualizations of the data collected seems to confirm that hypothesis.
For more details, you can also look at the previous analysis performed for 2016 and 2017