[BDNF]

If your brain wires itself for certain behaviors wouldn't pushing it every so often such as twice a week be giving it a workout it can start to adapt to, I know it's not a muscle but it's how neuroscience explains plasticity.

[Mark in Idaho]

Plasticity refers to the brains ability to work around a damaged area. That is not a healing process. Stress interferes with the healing process by causing stress chemicals that preclude or slow healing.

Plasticity would result from challenging your brain with memory tasks or processing tasks. That challenge is best done at a non-stress inducing level. It should not cause severe fatigue. The moment any fatigue becomes evident, the task should be ended or reduced.