Manual Planning of Cross-Training Activities by Intensity

I am a cyclist first and foremost, but I also swim as cross-training. I know many in the community cross-train in all sorts of different activities. I love that join now recognizes alternate activities after they are complete by assigning them to a primary zone category, e.g. endurance, tempo, threshold, etc. However, I like to plan my training in advance, and having to wait to see what my rides will be until after I have completed my cross-training activity is a drawback. It would be cool to have the functionality to advance schedule an alternate workout by zone classification. For example, in my case, I would like to tell the app on Sunday night that I will do an alternate tempo activity for 1 hour on Wednesday, and have Join adjust my plan as appropriate in advance.