Overworked, but content. That describes the majority of the American workforce, according to a survey of thousands of employees nationwide.

Christopher Robbins, ThinkStock

In the latest Staples Advantage Workplace Index, 53 percent of employees reported feeling burnt out, possibly due to longer hours or the fact that technology keeps workers "on" around the clock.

About a quarter of respondents said they regularly conduct work duties after the standard workday is over. At the same time, about half of employees claimed it's a struggle to take any kind of break during the day.

Still, the majority are content with their current working situation. Eighty-six percent said they are happy at work and may even want to see if they can advance their position.

Daryl Johnson, a contractor from Middletown, has been working 70-80 hours per week for his business, but he's doing it with a smile on his face.

"Some people don't have any work," he said. "I'm blessed."

Between 12 and 15 hours is a normal workday for Jack Perez of Trenton, who drives a truck from retailer to retailer, delivering cigarettes.

Perez said he's "very happy" with his current job, the main means of supporting his family.

"I'm by myself, there's no pressure," he said. "I just go about my business, about my day."

Email overload was a major concern among workers in the Staples survey. Over one-third of respondents said their inbox has a negative impact on productivity.