MET score of 20 METs when not doing strenuous exercise.

MET = Metabolic equivalent of task though and is not a measurement of heart rate. It's assuming that at rest my MET score is probably around 4 and then if it takes me more effort to do something, the MET score would increase as my body isn't at rest anymore. My heart rate for the MET score of 20 only reached 98 BPM and so wasn't too strenuous, yet this score is so high...

Below describes MET scores only going up to 12 usually, but mine go up to 16+ each month and I am not doing strenuous exercises, only walking sometimes at a fast pace.

Yes, whenever I go for a walk the Move calories always increase (as the MET score does), I close the Move ring quite easily before the end of the day on those days. Ah, it increases but I don't think it spikes like the MET score does - the 20 MET score was around 6-7pm and there is no spike at that time as shown below:

If so then at 20 METs, I have a much better MET score required to become a firefighter (which is recommended to be 12 METs) but this would mean I am super-healthy and fit which I don't think I am. I am wondering if the exertion needed to perform non-strenuous tasks is very high for me because the meds that I take affect it all.

Above is the screenshot. The 20 MET score was when I was walking the dog around 7pm in the park which was on level ground.

This is the screenshot of all MET scores so far: