For kids with ADHD, regular 'green time' is linked to milder symptoms

A study of more than 400 children diagnosed with Attention Deficit Hyperactivity Disorder has found a link between the children's routine play settings and the severity of their symptoms, researchers report. Those who regularly play in outdoor settings with lots of green (grass and trees, for example) have milder ADHD symptoms than those who play indoors or in built outdoor environments, the researchers found. The association holds even when the researchers controlled for income and other variables.

The study appears in the journal Applied Psychology: Health and Well-Being.

According to the Centers for Disease Control and Prevention, about 9.5 percent of children aged 4-17 had been diagnosed with ADHD as of 2007. Symptoms include severe difficulty concentrating, hyperactivity and poor impulse control.

Although many children with ADHD are medicated, most "would benefit from a low-cost, side-effect-free way of managing their symptoms," wrote University of Illinois crop sciences visiting teaching associate Andrea Faber Taylor and natural resources and environmental sciences professor Frances (Ming) Kuo, the authors of the study.

Previous research has shown that brief exposure to green outdoor spaces – and in one study, to photos of green settings – can improve concentration and impulse control in children and adults in the general population – individuals without ADHD.

These findings led Taylor and Kuo to examine whether children diagnosed with ADHD, which is characterized by deficits in concentration and impulse control, might also benefit from "green time." In a study published in 2004, they analyzed data from a national Internet-based survey of parents of children formally diagnosed with ADHD and found that activities conducted in greener outdoor settings did correlate with milder symptoms immediately afterward, compared to activities in other settings.

The new study explores other data from the same survey to determine whether the effect also is true for green play settings that are routinely experienced – the park, playground or backyard that a child visits daily or several times a week.

"Before the current study, we were confident that acute exposures to nature – sort of one-time doses – have short-term impacts on ADHD symptoms," Kuo said. "The question is, if you're getting chronic exposure, but it's the same old stuff because it's in your backyard or it's the playground at your school, then does that help?"

IMAGE: Numerous studies have found that short-term exposures to natural environments improve concentration and impulse control in children and adults immediately afterward. A new study indicates that even a routinely experienced...
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To address this question, the researchers examined parents' descriptions of their child's daily play setting and overall symptom severity. They also looked at the children's age, sex, formal diagnosis (ADD or ADHD) and total household income.