So can your friends and family members make you fat? That's what researchers at the Miriam Hospital's Weight Control and Diabetes Research Center set out to answer.
In a study published by the journal Obesity, young adults ages 18-25 were more likely to have overweight romantic partners and best friends, casual friends and even family members compared to normal weight peers. Overweight young adults also reported having social connections with other people trying to lose weight, had great weight loss intentions.
Why is this important? Forty percent of young adults age 18-25 are considered overweight or obese. This age groups is also experiencing the highest rate of weight gain per year-about one to two pounds.
The participants completed questionnaires to determine their weight and height, number of overweight social contacts (including best friends, romantic partners, casual friends, relatives and colleagues/classmates) and perceived social norms for obesity and obesity-related behaviors.
Overweight and obese study participants completed additional questionnaires to assess how many of their overweight social contacts were currently trying to lose weight, perceived social norms for weight loss (such as how frequently social contacts encouraged them to lose weight or whether the people closest to them would approve if they were to lose weight), and intentions to lose weight within the next three months.
Compared to normal weight young adults, those who were overweight or obese were more likely to have an overweight romantic partner (25 percent vs. 14 percent) and an overweight best friend (24 percent vs. 14 percent). The data suggests that obesity 'clusters' in this population. But interestingly, social norms for obesity did not differ between the two groups and did not account for the clustering. Both groups reported low levels of social acceptability for being overweight, eating unhealthy foods and being inactive.
The study also showed overweight and obese young adults who had more social contacts trying to lose weight were more likely to want to lose weight themselves. Social norms for weight loss, such as encouragement and approval from social contacts, account for this association.
The Miriam Hospital's Weight Control and Research Center also points out that young adults are less likely to participate in behavioral weight loss intervention programs, but when they do, they tend to lose less weight than older adults. According to one researcher, the key to an effective obesity treatment and prevention program; is identifying the factors that influence both weight status and weight control in this high-risk group.