The Mountain Climber exercise is one of those exercises that kills A LOT of birds with one stone.

Not only are you building core endurance, shoulder strength and endurance, upper and mid-back strength, and endurance you are also hitting your cardiovascular system as well.
You can make this exercise work for you a number of ways by adding a weighted vest to get more shoulder work, you can add ankle weights to challenge your body’s ability to maintain perfect form while increasing the weight of your legs being moved.
On top of that, you can vary the time you set out to do them for each training session.
My personal suggestion while you get a grip on how these are going to impact your low back is to start with 2-3 sets of 45 seconds and work up from there!
As a person of having the same problem for apparently being almost half of my life now. I am thankful for having to read this blog that you shared about having this workout executed properly for those who have chronic back pains. Having chronic back pains is definitely not a joke and not a good situation to be in.
Pumped that you found it! Thanks for checking it out and sharing!