The definition of maladroit is awkward or showing a lack of skills. An example of a maladroit person is an employee who cannot accomplish the simplest tasks of the job. noun
The historic view is that once brain cells are damaged or killed, they do not regenerate. Yet, research over the last 20 years is showing substantial evidence of cell regeneration, particularly in those under 40 year of age.
Excersise has been shown to regenerate new brain cells and I myself have noticed a lot of improvement after 1 day of running such as increased ability to stay focused and alert and increased short term memory. If I don't excersise for a week, then the benefits I gained from excersising start decreasing.