The point of vacation is to relax, but some Americans find escaping the daily grind is more work than their nine to five.
25 percent of workaholic Americans turn on their blackberry, or cell phone or laptop while on vacation.
Psychotherapist and author Dr. Bryan Robinson says the adrenaline rush many get from work keeps the brain wired even in relaxing situations.
Combine that with fears of losing your job or missing something important, and vacation just isn't vacation anymore.
"Almost half of American workers come back from vacation saying they are not rejuvenated because they worried about their jobs the whole time they were there," Dr. Robinson says.
A small percentage of vacationers actually go through work withdrawal: Feeling edgy, depressed...even having physical symptoms.
So how can you stay checked out of work once you've checked in at your vacation destination?
Dr. Robinson says to limit your use of work tools to once or twice a week, and actually add more time to your time off.
"The buffer at the front end and at the back end is always helpful so you can ease back in to work," he says.
Many employers are encouraging their workers to use all their vacation time because the realize a happy employee equals a happy, productive workplace.