The lengthy menu of group fitness programs at most gyms can be overwhelming. Here is advice from personal trainers on finding one suited for you:

Observe it first. Ask the instructor if you can stand in the back of the room and watch a class in action. You also can talk to some participants afterward and, if you like what you hear, get a few tips on tackling the first day.

Talk to the instructor. Find out the usual pace of a class and its fitness goals, whether it's overall toning, weight loss or working on specific body parts. A program also may be more or less intense on certain days of the week.

Determine your "impact" level. Aerobics classes usually are divided into low, medium and high impact. If you haven't exercised regularly and get out of breath fairly easily, start out low and aim to move up over time.

Consider your personality. An introvert may not fit into a loud, upbeat aerobics class as much as an extrovert. At the same time, going against your personality may be just what you need — for instance, a peaceful yoga class for a hard-charging type.

Don't be afraid to branch out. Many classes that seem intimidating – such as belly dancing, yoga or spinning — are organized so people of all fitness levels can enjoy them. You may be surprised by what you like (and remember: you don't have to go back).

Look for more than one class. Switching up your routine throughout the week will increase your body's fat-burning rate.

Bring a friend. Checking out a new class can be intimidating. Get a pal to join you — preferably another beginner.