Converting activities into steps

I would like to convert activities in steps. For example when I go on a bike tour with the family with several breaks over several hours, my hand / arm rests on the bicycle handlebar and nearly no step is counted. On such days I can't reach my step goal, even though I was on the move. I then register an activity with the net time of cycling.

I know lists for converting steps per minute or hour and I would like to have the option to set a checkmark in an activity, when I want to convert and add this to the normal steps. Perhaps in the graph for the steps these converted steps can be shown in a third colour?