The trend of exercise keeps on changing with the changing lifestyle of countries. Be it aerobics, dance, interval training, weight machines, medicine balls and Pilates falls all keep on coming and going with the fashion trends. But when it comes to exercise habits, Americans say they prefer to stick to what’s simple, solo and short.

A recent online survey of nearly 75 percent of 1,200 adults, aged 24 to 44, about exercise habits, says the participants worked out at least once a week and 77 percent prefer to do it alone.

Americans like everything simple, short and minimal when it comes to physical activity. Running was the most popular type of exercise followed by lifting weights and biking/hiking/outdoor activities, according to the survey by the watch company Timex.

“If it’s true, it’s good news for the fitness industry,” said Dr. Walter Thompson, who studies exercise trends for the American College of Sports Medicine (ACSM).

Thompson said the survey probably provides a “useful snapshot” into the behaviors of the responding age group. “Outside that group,” he said, “it’s a little dangerous.”

Some 29 percent of those surveyed said they spend between 30 minutes and one hour on their physical activities and 18 percent claim between one and two hours.

61 percent of people questioned in the poll said they don’t exercise in a gym, and the average American is no early bird.

Only 27 percent said they found time to get in a workout during the work day.