If you can't be like Arnie, hit the road Jack.
Of course, our discussion here, is not about the muscular system but rather the neural infra-structure for memory. This is what we are talking of developing through mental exercises.
The second approach involves using the body structure I have now, and employing some kind of strategy.
For example, a car jack would provide leverage for me to lift the car while my wife changes the tire. The job gets done although there has been no change in my neurological infra-structure.