Scared straight after a health threat?

People vow to change their ways, but often not for very long

The medical tests are back. The cruel news is delivered: the numbers show trouble inside your body.

Instantly, you rocket from mildly anxious to scared straight. That’s how it feels, anyway. In the exam room, in that raw moment, you firmly renounce your bad health habits. You promise to adopt a low-fat, gym-heavy routine. You’ll live right, you tell the doctor — and yourself. You’ll stick to it. You swear.

Save it. Your doctor has heard it before. 

“I think every physician has,” said Dr. Steven Chang, a family practitioner at the University of California Davis Medical Center and a staff physician at RightHealth.com. He recalled diagnosing some patients with diabetes and collaborating with them on a new diet plan. “They will leave my office and I’ll immediately see them in the [hospital] cafeteria — eating a hamburger and French fries ... That’s difficult.”

What’s the true shelf life of a health scare? That can depend on individual willpower, the height of the internal emergency and whether someone feels or sees physical symptoms — like chest pain or blood after coughing. Tangible signs of sickness may inject deeper fear and more lasting improvements compared to, say, merely reading ugly stats on a sheet of paper (such as a high cholesterol count).

A text message poll of 100 U.S. family physicians, conducted by Truth On Call for msnbc.com, found that 47 percent of doctors said patients typically stick to their vow to live better for just a matter of weeks after a health scare, 25 percent said the good behavior lasts several months and just 7 percent said patients stick to their resolve for a year or longer. Nineteen percent said the effect of a health scare lasts just a few days and 2 percent said it doesn't last for even a day. 

Chang said he pins the typical duration of fright-induced lifestyle adjustments at three to six months. “Once you start an exercise regimen, if it peters out after a few months and if you don’t feel any different, the impetus to change may not be [as strong] as that initial shock.”

As Lori Hope found, drastic change is tough to maintain no matter how powerful your motivation.

“How long can we go vegan and macrobiotic? How long can we sustain that?” asked the former medical journalist. 

In 2002, after Hope was diagnosed with lung cancer, she stepped up her exercise routine. She already ate an organic diet but also added meditation and yoga to the list of things she tried to boost her health.

"I continued after my treatment, but that went away fairly quickly," she said, finding it her busy schedule made it impossible to do it all.