Loneliness Persists Despite Healthy Lifestyles, Study Finds

Being busy is not the same as being connected, and new research suggests the difference matters for health in measurable ways. A study published in Nature Communications by researchers at Tulane University examined how feeling alone, as opposed to simply having social contact, relates to both physical and mental health. Its findings complicate the popular assumption that a well-run life can compensate for a disconnected one.

The research drew on 277,489 adults aged 40 to 69 from the UK Biobank, all of whom started out free of seven major chronic conditions. The team wanted to ascertain how feeling lonely versus actual social contact affected health outcomes, measured through an observational design by looking at how many years people aged 50 and up could expect to live free of disease.

The authors defined social isolation as an objective measure of the amount of social connection a person has. Loneliness, by contrast, is a subjective measure of a person’s dissatisfaction with the quality of their relationships, regardless of how social the person actually is. That distinction gets at a question worth asking as a culture of busyness and hustle thrives in social media-driven worlds: is a diary full of activities and meetings the same as feeling connected to others?

The results suggest it is not. The researchers compared people who were both lonely and isolated with those who were neither. Considering physical conditions first, women who were both lonely and isolated lost 2.4 years free of physical disease, while men lost 1.7 years. Mental health told a different story. Women lost around 3.7 years free of mental disorders, and men lost nearly six.

Where lifestyle comes in, the picture is instructive. Differentiating the impacts of individual lifestyle factors is genuinely difficult, because in reality many people adopt changes in multiples. Exercising more, going to bed early, and cutting back on alcohol often form a triad of both advice offered and habits taken up. Against that backdrop, the team found that having a healthy lifestyle, meaning good diet, exercise, decent sleep and not smoking, helped buffer the effects of isolation but made no meaningful difference to loneliness. In other words, the practical conditions of a healthy life can soften the consequences of having few contacts, yet they do nothing to fix the felt experience of disconnection.

That finding tracks with what clinicians and commentators have long observed. You can do everything right on paper and still feel lonely. This sense of disconnection is often reported in younger people and adults who may have a very active online presence. Because the Biobank study is observational, it cannot prove that loneliness causes illness, but it does suggest that how connected people feel deserves to be taken as seriously as a step count.

It is also worth separating being alone from feeling lonely. Loneliness does not require solitude, and solitude does not require loneliness. Anyone who has lost a loved one knows how loss can bring a discombobulation that challenges who we are and how we see ourselves. But it does not have to be the loss of a person that brings a sense of being alone. Retirement, becoming empty nesters, or even a changing sense of self can alter how connected we feel with the world around us. Fiction reflects this too: characters like Fleabag, Bridget Jones, and Ted Lasso are surrounded by people at work, socially, even at home, and still feel desperately alone. Paul Tillich put the distinction elegantly in The Eternal Now, noting that language created the word loneliness to express the pain of being alone and the word solitude to express the glory of being alone.

For those who see themselves in these findings, the practical starting point is an honest inventory of connection. Useful questions include how connected you feel in the workplace, both within your professional role and to your colleagues; who you spend your time with in friendships and casual coffees, and how connected to them and yourself you feel before, during, and after; and how frequently you meet people outside your immediate circle, and how you feel about that. Moving through life stages brings both challenges and opportunities in the frequency of social contacts and in how connected we feel, and it is worth considering your own relationship with both.

As for what to do about it, treating connection as an important lifestyle factor, like sleep, nutrition, and diet, can help. A healthier lifestyle overall can mitigate the effects of isolation, according to the study. Loneliness itself can be harder to deal with, and if it is swamping your life or seriously affecting your ability to function, discussing it with your doctor is important. Otherwise, the fix may be a tweak in how time is spent. Less may be more. Instead of seeing friends who leave you feeling uplifted and heard just once a year, it may be worth finding a way to add a second meet-up. Similarly, a weekly coffee with a nearby friend that leaves you feeling stressed or frustrated might be worth swapping for a trip to the gym, or something else that gives more back. Fewer but stronger connections, the research suggests, may beat a jam-packed calendar. And if a quick reminder is needed that connections can be found in unexpected places, there is always Up.