Admit it. You’ve had days at work where it takes a Herculean effort to stay awake and concentrate.

A new study by the Virgin Pulse Institute found that 76% of the U.S. workforce is tired most weekdays. What’s more, 40% of employees (admitted) they’ve dozed off during the day once per month. And it’s not just during the post-lunch lull.

A survey by Blue Jeans Network discovered that 6% of people confessed to dozing off while on an audio-only conference call.

It’s no wonder. There’s a yawning divide between the amount of sleep recommended —between seven and nine hours per night—and the actual time we’re getting shut-eye. Though it’s not a one-size-fits-all thing, the National Sleep Foundation reports that one in five American adults show signs of chronic sleep deprivation, making the condition a widespread public health problem.

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