How screens may affect weight, desire to exercise

A study released last week by the National Institutes of Health suggests that falling asleep with the TV on can have a negative effect on hormone production and metabolism, leading in many cases to weight gain. (Adobe Stock photo)

Since the iPhone was introduced in 2007, excessive smartphone use has been linked to a host of maladies: everything from long-term damage to the neck and cervical spine to an increased risk for depression and isolation – especially among teens. 

So we’ve been well warned about the proper technique (phone held at eye level; neck in a straight, neutral position) and amount of time (90 minutes or so daily) in which we can use our handheld devices without causing excess harm.