When someone sets out to improve their health, they usually take a familiar path: starting a healthy diet, adopting a new workout regimen, getting better sleep, drinking more water. Each of these behaviors is important, of course, but they all focus on physical healthโ€”and a growing body of research suggests that social health is just as, if not more, important to overall well-being.One recent study published in the journal PLOS ONE, for example, found that the strength of a personโ€™s social circleโ€”as measured by inbound and outbound cell phone activityโ€”was a better predictor of self-reported stress, happiness and well-being levels than fitness tracker data on physical activity, heart rate and sleep. That finding suggests that the โ€œquantified selfโ€ portrayed by endless amounts of health data doesnโ€™t tell the whole story, says study co-author Nitesh Chawla, a professor of computer science and engineering at the University of Notre Dame.

โ€œThereโ€™s also a qualified self, which is who I am, what are my activities, my social network, and all of these aspects that are not reflected in any of these measurements,โ€ Chawla says. โ€œMy lifestyle, my enjoyment, my social networkโ€”all of those are strong determinants of my well-being.โ€Chawlaโ€™s theory is supported by plenty of prior research. Studies have shown that social supportโ€”whether it comes from friends, family members or a spouseโ€”is strongly associated with better mental and physical health. A robust social life, these studies suggest, can lower stress levels; improve mood; encourage positive health behaviors and discourage damaging ones; boost cardiovascular health; improve illness recovery rates; and aid virtually everything in between. Research has even shown that a social component can boost the effects of already-healthy behaviors such as exercise.

Social isolation, meanwhile, is linked to higher rates of chronic diseases and mental health conditions, and may even catalyze cellular-level changes that promote chronic inflammation and suppress immunity. The detrimental health effects of loneliness have been likened to smoking 15 cigarettes a day. Itโ€™s a significant problem, especially since loneliness is emerging as a public health epidemic in the U.S. According to recent surveys, almost half of Americans, including large numbers of the countryโ€™s youngest and oldest adults, are lonely.

A recent study conducted by health insurer Cigna and published in the American Journal of Health Promotion set out to determine whatโ€™s driving those high rates of loneliness. Unsurprisingly, it found that social media, when used so much that it infringes on face-to-face quality time, was tied to greater loneliness, while having meaningful in-person interactions, reporting high levels of social support and being in a committed relationship were associated with less loneliness. Gender and income didnโ€™t seem to have a strong effect, but loneliness tended to decrease with age, perhaps because of the wisdom and perspective afforded by years of life lived, says Dr. Stuart Lustig, one of the reportโ€™s authors and Cignaโ€™s national medical executive for behavioral health.

Lustig says the report underscores the importance of carving out time for family and friends, especially since loneliness was inversely related to self-reported health and well-being. Reviving a dormant social life may be best and most easily done by finding partners for enjoyable activities like exercising, volunteering, or sharing a meal, he says.

โ€œReal, face-to-face time with people [is important], and the activity part of it makes it fun and enjoyable and gives people an excuse to get together,โ€ Lustig says.Lustig emphasizes that social media should be used judiciously and strategically, and not as a replacement for in-person relationships. Instead, he says, we should use technology โ€œto seek out meaningful connections and people that you are going to be able to keep in your social sphere. Itโ€™s easy enough to find groups such as Meetups, or to find places to go where youโ€™ll find folks doing what you want to do.โ€ That advice is particularly important for young people, he says, for whom heavy social media use is common.Finally, Lustig stresses that even small social changes can have a large impact. Striking up post-meeting conversations with co-workers, or even engaging in micro-interactions with strangers, can make your social life feel more rewarding.โ€œThereโ€™s an opportunity to grow those kinds of quick exchanges into conversations and into more meaningful friendships over time,โ€ Lustig says. โ€œPeople should take those opportunities wherever they possibly can, because all of us, innately, are wired from birth to connectโ€โ€”and because doing so may pay dividends for your health.