People seeking to get or stay fit in the coming year might do better not to rely on a New Year's resolution to shape up, fitness experts say.

Losing weight and getting fit and healthy are among the top five resolutions every year, even though most of winter's great expectations wither by spring.

"The New Year's resolution is a kind of grand, glorified, long-term goal that people, for societal reasons, tend to begin on the first day of the calendar year," said Gregory Chertok, a sports psychology consultant with the American College of Sports Medicine.