It's interesting to me, because I use a custom format that I created for simplicity. I'll just share a snippet for comparison:

    # skip travel
    2020/07/15 push 14,18,14,14,30 # hpu w3c3d1
    2020/07/14 pull 5,5,5,5
    2020/07/13 push 22,30,20,20,30 # hpu w3c3d3, succeeded
    2020/07/12 pull 5,5,5,5
    2020/07/11 push 20,25,15,15,40 # hpu w3c3d2, rests were 30sec too short

I like having a single data file (or maybe one per year), with each session on a single line. I only use it for pretty simple bodyweight exercises.