are there days where you only train certain parts of your body / only do certain exercises because you simply don’t have the time for a full workout?
my ideal workout means stair climbing, running-walking and stretching. It can well last 2 hours.
Some days I don’t have enough time to do all that. Would it be better to do less of each kind of exercising or just to fixate on one kind?
Do you have 30min? You can get a decent strength workout in that time if you push yourself and take 30-45s of rest.
For cardio you could try high intensity interval training for 30mins.
Here is what I’d do. Full body workout 1 day. High intensity interval training the next. Stuff like sprints, hill climbs ab work. Workout as much as possible.