Question

What is an emotional strain that prevents efficient performance known as?

Answer 1

That would be stress.
Built up stress hinders efficient performance.

Answer 2

Answer:

An emotional strain that prevents efficient performance is known as stress.

Explanation:

Stress is defined as a normal response to situational pressures or demands that are perceived as threatening or dangerous. Although sometimes stress can jump-start the person's adrenaline and motivate that person to perform in a quick manner, when stress becomes regular and the pressure does not decrease, the individual will have such an emotional strain that it will prevent them from efficiently performing, whether at work, school or in their personal life.