Modify strength percentage increase stat feature

In the app after you complete an exercise/workout it will tell you the percentage by which your strength increased.

I noticed that it will give me this stat the first time I do an exercise. Since it is the first data point the app has, it has nothing to compare to, so my strength percentage increases are in the 100s.  

This throws off my overall stats in the dashboard, saying my strength has increased 41% in the past three workouts, when really the app had me start rotating in easy workouts for the first time.

I don’t want the app to calculate my strength percentage gains based off 0 and the first data point in an exercise, but start to calculate it between the 1st and 2nd data points, the 2nd and 3rd data points and so on.