Compared to employees at either end of a firm’s management spectrum, the middle managers have a relatively complicated relationship with power. They are expected to play very different roles when interacting with different groups, frequently alternating between high and low power interaction styles. This imposes a psychological burden because humans are inefficient when it comes to task switching: It is psychologically challenging to disengage from a task that requires one mindset and engage in another task that requires a very different mindset. There are however some steps that could be taken to reduce such a burden on middle managers, namely simplifying the reporting structure to reduce unnecessary upward and downward interactions, not micromanaging the middle managers, and putting in place a more egalitarian organizational structure.
Source: Havard Business Review