If you're a guy in your 20s on a day hike in a national park in Utah, step carefully. You're among the most likely to need rescuing.

A new study of rescues in Utah's national parks between 2001 and 2005 shows that 60 percent involved men. Most ran into problems while on a day hike or boating.

Glen Canyon National Recreation Area and Zion National Park had the most search and rescue operations and the highest number of medical calls. They're also the two busiest parks in the state.

Most of problems were due to poor judgment, improper equipment, fatigue and injury.

Travis Heggie, an assistant professor at the University of North Dakota, compiled the figures. He says he's hoping a greater emphasis will be placed on safety inside national parks.