I have been applying the 15 Minute Challenge to my health in several dimensions.
Along with the major changes in my life it had started to become apparent to me that I needed to do something about my body's condition or (A) die young or (B) become an invalid. (B) sounded worse than (A) and neither sounded good.
So I took several steps and one of them was to start using my gym membership more effectively.
I know the kinds of workouts we need for maximum aerobic effect, but I also knew I had to start somewhere - and I did - 15 minutes - a little of this, a little of that, a little of the other, and a lot of hot tub.
It is a start. Now I am up to a longer workout and feeling positive results.
Don't let starting slow or with inadequate resources stop you from starting at all.