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For Teens, Smartphone Dependence Predicts Later Depression

We have known for years that excessive smartphone use is correlated with depression. However, until recently, the direction of causality was not known. Does excessive smartphone use cause people to become depressed? Or do people who are already depressed use their smartphones more often, leading to unhealthy dependence? A recent study published in the Journal of Adolescent Health lends support to the former hypothesis. This study, which followed adolescents between the ages of 17-20, found that dependence on smartphones at the start of the study predicted depression and loneliness three months later.

Although the mechanism of action here is not yet known, I have several thoughts about why and how excessive smartphone use can lead to depression. First, there’s the neurobiological effect of the smartphone use itself, which activates the Sympathetic Nervous System (“fight or flight” response), increases threat perception, and disrupts sleep. The Sympathetic Nervous System (SNS) is designed to protect us from danger by elevating heart rate, increasing levels of cortisol, and giving us the burst of energy we need to fight off a predator or flee from danger. The SNS is meant to be activated periodically, and for limited durations of time, when danger is present until danger passes. It is not meant to be activated every few seconds, all day long, each time we receive a notification on our iPhone. Over time, chronic SNS activation leads to depletion and depression. So does sleep deprivation.

Second, there’s social comparison. Adolescents are especially vulnerable to peer influence and frequently compare themselves to others to gain a sense of their social standing. Teens who spend excessive amounts of time scrolling through social media are likely to judge themselves unfavorably compared to others. It is all too easy for these teens to conclude that other people are prettier, thinner, happier, more successful, and having more fun than they are. Of course, most people only post pictures of themselves looking great, having fun, and doing interesting things, even if the majority of their lives are spent looking average and completing mundane tasks like homework and chores. Nonetheless, upward social comparisons such as these tend to lower self-regard, and poor self-esteem fuels depression.

Finally, excessive smartphone use has to replace other activities. There are only 24 hours in a day. If a teen is spending 15 hours per day on his smartphone, what is he NOT doing? Well, for starters, he is probably not getting a good night’s sleep. He is probably not eating balanced meals with his family, or if he is, he’s eating mindlessly while scrolling through social media rather than engaging in meaningful conversation with his parents and siblings. He is probably not present or engaged in class, and he is constantly distracted while doing homework (if he even does homework), which means he is not learning much nor reaching his academic potential. He is not getting much physical activity or time outdoors. He may not be participating in social activities (of the in-person variety), or clubs, or hobbies, or lessons, or volunteer work, or religious services. In other words, the habits and activities that have been proven to help us stay healthy and balanced and socially connected, that give us a sense of meaning and purpose in life, are notably absent in those who are dependent on smartphones.

In my clinical practice, I strongly encourage teens and young adults to limit their screen time. To promote restful sleep, which is essential for both physical and mental wellbeing, I recommend turning off all electronic devices one hour before bedtime and leaving them off overnight. It is remarkable how much better teenagers sleep, and how much better they feel during the day, when they turn off their phones and computers by 10:00 pm, relax before bedtime, and sleep a full 8 hours.

For individuals who experience body image distress or social anxiety, limiting use of social media can help reduce symptoms. This could involve unfollowing certain people who are especially triggering, or simply limiting the amount of time spent on social media to 30 minutes per day, for example. I will never forget the 15-year-old girl who suffered from Generalized Anxiety Disorder who, upon getting rid of SnapChat for a week, experienced complete relief from her symptoms! Unfortunately, she later returned to SnapChat and began experiencing more anxiety. Eventually, she figured out a way to set limits on her SnapChat use, which allowed her to remain connected with her friends while causing only a slight increase in anxiety. Personally, I would have gotten rid of SnapChat completely and permanently, but try telling that to a very social, strong-willed 15-year-old.

Like many technological advances that preceded it (the automobile, the television, the internet), the smartphone is a wonderful invention that has improved the quality and efficiency of our lives. But there is a fallout from many technological advances, particularly when they are used carelessly or in excess (e.g., global climate change, couch potatoes, cyber-bullying). The smartphone is no exception.

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Kids who Diet: There’s an App for That, But Shouldn’t Be

WW International, the company formerly known as Weight Watchers, recently launched an app called Kurbo which is designed to help children ages 8-18 to diet and lose weight. The app is marketed as a “health coaching” tool, but a closer look at the company’s website reveals testimonials of children losing weight and dropping BMI points, complete with “before” and “after” photos. In recent years, the words “diet” and “dieting” have been replaced with words like “wellness” and “healthy eating” in popular nomenclature. But more often than not, when people refer to “eating healthy,” they are talking about restricting calories, reducing carbohydrates, and decreasing portion sizes. In other words, dieting in pursuit of weight loss. The brilliant marketing team at Weight Watchers, aware of this cultural shift in nomenclature, re-branded themselves as WW (Wellness that Works) to stay in vogue with their client base: people living in larger bodies.

But make no mistake: Kurbo is a diet app designed to help children lose weight. Although the app is touted as being based on years of scientific research, the very existence of this app defies the best available scientific evidence, which strongly suggests that CHILDREN AND ADOLESCENTS SHOULD NOT DIET.

Why? Let me count the reasons.

  1. Bodies are meant to be diverse in size and shape. The very notion that a child or adolescent should lose weight in order to have an acceptable body flies in the face of genetics and natural size diversity.
  2. Weight loss disrupts crucial physiological processes in the growing bodies of children and adolescents. Puberty requires significant weight gain to ensure proper development of the brain, bones, reproductive organs, and other vital body systems. Losing weight during adolescence can halt puberty, stunt vertical growth, and alter hormone levels.
  3. Dieting is not effective at producing long-term weight loss, but it reliably predicts weight gain and depression. More often than not, dieting leads to weight cycling: losing weight in the short-term but regaining weight and ending up at the same weight, or a higher weight, in the longer-term. Our bodies have evolved to protect us against famine by slowing down metabolic processes when food is scarce (such as, when we are dieting and losing weight) and ramping up hunger signals and cravings, which often leads to overindulgence or binge eating. Weight cycling is associated with negative health outcomes, including increased risk of depression. Individuals who diet frequently experience cycles of shame, guilt, and feelings of failure each time they regain lost weight.
  4. The normalization and glorification of diet culture is harmful and toxic to all children. When a person in a position of authority (e.g., doctor, parent, teacher, coach) tells a child or adolescent to lose weight, or places that child or adolescent on a diet, the message being sent (either subtly or overtly) is: “Your body is not acceptable as it is, and you must work very hard change your body in order to be attractive, healthy, happy, or socially accepted.” This message is damaging to a young person’s self-esteem, confidence, and body image.
  5. Diet culture disproportionately targets and stigmatizes individuals in larger bodies, thus perpetuating weight stigma.
  6. Although dieting itself does not cause eating disorders, dieting (or food restriction of any kind) can trigger the onset of an eating disorder in a child who is genetically vulnerable. Further, diet culture creates a toxic environment for individuals who are recovering from eating disorders. Eating disorders are dangerous, debilitating, difficult to treat illnesses that have the highest mortality rate of any psychiatric disorder.

Thankfully, there are many other individuals and organizations who share my sentiments on this matter and are publicly condemning this app.

  1. Healthcare Providers Against Kurbo. A group of physicians, psychologists, therapists, and dietitians who specialize in treating eating disorders has formed a petition protesting the Kurbo app. You can read and sign the petition here.
  2. Registered Dietitian Christy Harrison published an article in the New York Times explaining why the Kurbo app is harmful to children.
  3. FEAST (Families Empowered and Supporting Treatment for Eating Disorders) posted a position statement condemning this app.
  4. NEDA (National Eating Disorders Association) published a position statement expressing grave concerns about the app.

So, you might ask, if dieting is not the answer, then what should we do about childhood obesity? The answer, based on the best available scientific research, is that obesity per se is not the problem, and thus the pursuit of weight loss per se is not the solution. Instead, adults who are charged with the task of caring for our youth (e.g., parents, teachers, coaches, and doctors) should encourage health-promoting behaviors in children across the weight spectrum. Children of all weights will benefit from eating balanced family meals containing a wide variety of foods from all food groups. Children of all weights benefit from adequate sleep, daily physical activity, and limited screen time. Children of all weights should be taught body acceptance and should be educated about size diversity. This is true health promotion. In some cases, these health-promoting behaviors will result in weight loss for higher-weight children, and in some cases, they will not. But regardless of what happens to the child’s weight, these health-promoting behaviors bring about genuine improvements in the child’s physical and mental well-being. And – this is important – NO HARM IS DONE.

Sorry, WW Kurbo app – you’ve got it all wrong.