Helping your coworkers too often can lead to mental and emotional exhaustion—depletion effects—and hurt your job performance, a new study suggests.

In "When Lending a Hand Depletes the Will: The Daily Costs and Benefits of Helping," published in the in the Journal of Applied Psychology, Russell Johnson, associate professor of management at Michigan State University’s Eli Broad College of Business, and colleagues say the depletion effects were especially strong for employees with high “pro-social motivation”—or those who care deeply about the welfare of others.

While previous research on helping has focused largely on the effects on the beneficiaries, this is one of the first studies to focus on the helpers.

“Helping coworkers can be draining for the helpers, especially for employees who help a lot,” says Johnson.

Somewhat ironically, the draining effects of helping are worse for employees who have high pro-social motivation.

"Somewhat ironically, the draining effects of helping are worse for employees who have high pro-social motivation. When these folks are asked for help, they feel a strong obligation to provide help, which can be especially taxing.”

The Study

Sixty-eight employees in a variety of industries, including finance, engineering, and healthcare, participated in the study by filling out surveys in the morning and afternoon for 15 consecutive workdays.

The surveys measured depletion using a previously established scientific scale and helping through another scale that presents scenarios such as, “Today, I went out of my way to help coworkers who asked for my help with work-related problems.”

The findings suggest employees should exercise caution when agreeing to help, because helping may leave them depleted and less effective at work.

Help-seekers, on the other hand, should realize that asking for help, especially multiple times a day, has detrimental effects on the employees who are helping.

“This is not to say that coworkers should avoid seeking help, but that they ought to consider the magnitude and solvability of the issue before doing so and avoid continually seeking help from the same person,” the study says.

On the bright side, when helpers are thanked or made aware of the positive results of their actions, this can minimize and may even reverse the effects of depletion. “Thus, help-seekers can reduce the burden they place on helpers by clearly expressing the positive impact that helping had on them,” the study states.