How do we tell the difference between a desk job and otherwise

Like how do we tell that, i imagine if we look at all the contrary factors like mars (energy) , 6th house and all that it might just be a desk job in sports right? Like all those indication might still give a desk job in the said field.

And how do we tell if the person enjoys their job instead of wating to kill themselves every day, i suppose dignities of those planet in the navamsha?