Many employers are focused on recruiting talent in today's tight labor market. At the same time, however, the retention and productivity of current workers likely are being hurt by high levels of burnout.

Nearly three in four U.S. workers have suffered from burnout and associated symptoms as a result of their current role, according to research by Ringover, which markets office messaging products. Among the findings:

• A heavy workload (43%), lack of resources (37%), and micromanagement (37%) are the leading causes of work-related burnout.
• Men are more likely to take action following burnout than their female counterparts. More than two-thirds of male workers have considered leaving their current role because of burnout, compared with 59 percent of women.
• Workers between the ages of 18 and 24 are the most frequently affected by burnout, with 85 percent of workers in this age bracket suffering from burnout or one or more associated symptoms.
• Although one in eight workers aged 55 to 64 are unsure of the symptoms of burnout, just over half in that age bracket claim to have been affected by those symptoms, indicating they may feel uncomfortable discussing their stresses in the workplace.

The top 10 industries at risk of losing employees because of burnout, based on the percentage of workers who have considered leaving in the last 12 months, are financial activities and insurance, information publishing and telecommunications, construction, the public sector, agriculture, professional and business services, manufacturing, education, wholesale and retail trade, and transportation and utilities.

When asked about the main triggers and causes of burnout and associated symptoms, more than two in five respondents said a heavy workload is the main trigger for their workplace stress. Other triggers identified by the research include lack of resources (38%), micromanagement (38%), and a toxic work environment (35%).