NEW YORK (CNN/Money) - If you feel like you work all the time, that may be because you do.

Workers are putting in longer hours than ever, resulting in increased stress and less confidence in corporate leadership, according to a recent survey by ISR, an employee research and consulting firm.

The ISR survey found that workers who report high stress on the job also said their bosses were doing a less adequate job of setting direction, encouraging cooperation and communicating well to employees.

The study also found that workers who reported lower levels of stress were more confident in their bosses' abilities in those areas.

"One of the more interesting findings that this study confirmed was the direct connection between good management practices and an improved bottom line," says Dr. Rebecca Masson, Research Director at ISR.

Among industrialized economies, the U.S. ranks as one of the highest in average annual hours worked per person, a rank that's remained virtually unchanged since 1990, ISR said, quoting statistics from the International Labor Organization at the United Nations.

Not only are workers working longer, but that trend is likely to accelerate as baby boomers retire and growth in the nation's labor force slows, the firm said.

The ISR survey polled 50,000 employees at various consumer goods, financial services, manufacturing and professional services companies.

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