Gym membership may offer significant health benefits, according to research from Iowa State University. The study found that people with gym memberships exercised more regularly and showed better measures of cardiovascular health than people who did not belong to a health club.
Researchers interviewed 204 gym members and 201 people without gym memberships about their physical activity.
The results showed a clear difference in exercise habits. About 75 percent of gym members met federal recommendations for at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity each week, along with strength training at least twice a week.
Among people without gym memberships, only 18 percent met both exercise targets.
Gym Members Showed Better Health Measures
The higher level of physical activity among gym members was also linked with several health differences.
Gym members were 40 percent less likely to have obesity than people without memberships.
They were also 50 percent less likely to have an elevated resting heart rate. An elevated resting heart rate has been associated with a higher risk of death related to heart problems.
The researchers also found a difference in waist size. Gym members had waist circumferences that were about 1.5 inches smaller on average.
The finding is relevant because excess fat around the waist can pose a greater risk to heart health.
Fitness Levels Were Higher Among Gym Members
The study also measured cardiorespiratory fitness.
People with gym memberships performed better on tests of cardiorespiratory fitness. This measure reflects several aspects of physical performance, including heart strength, lung function, blood circulation and muscle mass.
The researchers also found that the health benefits were greater among people who had maintained their gym memberships for more than one year.
The Study Does Not Prove Gyms Cause Better Health
The findings do not establish that joining a gym directly causes people to become healthier.
The researchers pointed out that people who already have a strong commitment to exercise may be more likely to purchase a gym membership. For these individuals, a gym provides a convenient place to maintain their existing workout routine.
This means the membership itself may not explain all of the differences between the two groups.
Why a Gym Membership May Help Build an Exercise Habit
Despite this limitation, the researchers said joining a gym could help some people develop a consistent exercise routine.
Access to exercise equipment can make regular workouts more convenient. Social support at a gym may also encourage people to keep exercising.
The financial commitment involved in paying for a membership could provide another reason to maintain a regular workout schedule.
Overall, the Iowa State University research found that gym members were more likely to meet recommended exercise targets and had several better health and fitness measurements than people without gym memberships. The strongest benefits appeared among those who maintained their memberships for more than a year.