My mars is in Sagittarius in the 7th house. Pluto rules my 7th house, located in the my 6th house.
Transit Saturn is just now completely leaving my mars at 9 degrees separating and it has been one hell of a journey.
It definitely adds a depressing feeling towards your daily drive, ambitions, etc or at least that has been my experience.
My response is probably biased though because I have mars square Saturn natally and I have a ton of other important transits going on as well.
But from what I gathered from transit saturn conjunct mars is you're being tested in whatever house your mars is in in relation to what mars represents (drive, sexuality, ambition, etc).
For example, my mars is in Sagittarius, 7th house. I also have mars conjunct pluto, mars square Saturn, mars semi-square uranus so I have a really nasty temper. So Ever since Saturn entered my 7th, all of my relationships or at least most, have been in a state of turmoil. It's harder to control my anger and I just feel blocked and unable to move about in the world how I would like.