Green Spaces Make Kids Smarter
July 02, 2015
Story at-a-glance
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Children with greater exposure to green spaces, particularly
while at school, had improved working memory and decreased
inattentiveness
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During a one-year period, children exposed to significant
green spaces had a 5 percent increase in the development of
working memory and a 1 percent decrease in inattentiveness
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Past research revealed children attending schools with
greater amounts of vegetation scored higher on academic
tests
By Dr. Mercola
Spending time in nature is important for physical and mental
health, but more than 80 percent of Americans live in urban
areas,1
which can limit access to green spaces.
Research conducted in the Netherlands in 2001 revealed people
report fewer health complaints and better mental health when
they're in a greener environment.2
Further, all types of green space – city parks, agricultural
areas, forest, etc. – were equally beneficial. As reported by
The Trust for Public Land:3
"The benefits extend to psychological health. 'The
concept that plants have a role in mental health is well
established,' according to a review of previous studies by
Howard Frumkin in the American Journal of Preventive
Medicine.
"Horticultural therapy evolved as a form of mental
health treatment, based on the therapeutic effects of
gardening. It is also used today in community-based
programs, geriatrics programs, prisons, developmental
disabilities programs, and special education."4
Further, 'research on recreational activities has
shown that savanna-like settings are associated with
self-reported feelings of 'peacefulness,' 'tranquility,' or
'relaxation,'' Frumkin writes.
"Viewing such settings leads to decreased fear and
anger…[and] is associated with enhanced mental alertness,
attention, and cognitive performance, as measured by tasks
such as proofreading and by formal psychological testing."
Such benefits also extend to children, among whom researchers
recently unveiled a promising benefit of adding green spaces to
schools.
Green Spaces in Schools May Boost Cognitive Development
In a study of 2,600 children between the ages of 7 and 10,
those with greater exposure to green spaces, particularly while
at school, had improved working memory and decreased
inattentiveness.5
During a one-year period, children exposed to significant
green spaces had a 5 percent increase in the development of
working memory and a 1 percent decrease in inattentiveness.
A large part of the benefit (anywhere from 20 percent to 65
percent) was attributed to a reduction in exposure to air
pollution as a result of the green spaces.
Access to nature and the outdoors also increases physical
activity and reduces noise exposures, which are also beneficial
for mental health. There's also past research that suggests
"microbial input" from spending time in nature plays a role in
brain development.6
A 2014 study similarly found that children attending schools
with greater amounts of vegetation scored higher on academic
tests in both English and math.7
The researchers of the current study explained:8
"Contact with nature is thought to play a crucial
and irreplaceable role in brain development… Natural
environments including green spaces provide children with unique
opportunities such as inciting engagement, risk-taking,
discovery, creativity, mastery and control, strengthening sense
of self, inspiring basic emotional states including sense of
wonder, and enhancing psychological restoration."
5 More Benefits of Spending Time in Nature
A trip to a park, nature preserve, river trail, local farm,
or any other natural space can benefit children and adults alike
– so much so that you should really strive to spend time in a
"green" space each and every day. Such benefits include:9
1. Improving Focus
Among
children with ADHD, spending time in nature leads to
improvements in focus and higher scores on concentration
tests. Richard Louv, in his book Last Child in the Woods,
even used the term "nature-deficit disorder" to describe
behavioral problems he believes stem from spending less time
outdoors.10
2. Boosting Creativity
One study found walking increased 81 percent of
participants' creativity, but walking outside
produced "the most novel and highest quality analogies."11
3. Getting More Out of Your Workouts
"Green exercise," which is exercise in the presence of
nature, has unique benefits above and beyond indoor
exercise. One meta-analysis of 10 studies found that
physical activity outdoors for as little as five minutes
leads to measurable improvements in mood and self-esteem.12
In addition to boosting your mood, outdoor exercise can
be more challenging, leading to greater physical gains. For
instance, if you walk, jog or cycle outdoors, you'll have to
expend more energy to overcome wind and changes in terrain.13
There's even research showing levels of the stress
hormone cortisol are lower when people exercise outdoors as
opposed to indoors.14
4. Less Pain and Better Sleep
Older adults who spend more time outdoors have less pain,
sleep better and have less functional decline in their
ability to carry out their daily activities.15
According to research published in Biopsychosocial
Medicine:16
"The healing power of nature, vis medicatrix
naturae, has traditionally been defined as an internal
healing response designed to restore health.
Almost a century ago, famed biologist Sir John
Arthur Thomson provided an additional interpretation of
the word nature within the context of vis medicatrix,
defining it instead as the natural, non-built external
environment.
He maintained that the healing power of nature is
also that associated with mindful contact with the
animate and inanimate natural portions of the outdoor
environment.
…With global environmental concerns, rapid urban
expansion, and mental health disorders at crisis levels,
diminished nature contact may not be without consequence
to the health of the individual and the planet itself."
5. Increasing Your Vitamin D Levels
Spending time in nature allows kids and adults plenty of
sun exposure to build and maintain their
vitamin D levels. Increasing your vitamin D levels is
important, as researchers have pointed out that increasing
levels of vitamin D3 among the general population could
prevent chronic diseases that claim nearly one million lives
throughout the world each year.
Incidence of several types of
cancer could also be slashed in half. Vitamin D also
fights infections, including colds and the flu, as it
regulates the expression of genes that influence your immune
system to attack and destroy bacteria and viruses.
I firmly believe appropriate sun exposure is the best way
to optimize your vitamin D levels, and the more time you
spend outdoors, the easier it will be for you to naturally
keep your vitamin D levels in the therapeutic range of
50-70 ng/ml.
Spending Time in Green Spaces Contributes to Improved Well-Being
According to research published in the Journal for the
Study of Religion, Nature and Culture, children who spent
five to 10 hours a week outside developed a strong attachment to
nature, a value that is important to both human development and
well-being.17
Children who spent a lot of time outdoors also experienced a
wealth of positive emotions, including peacefulness, happiness,
and a sense of belonging to the world. As you might suspect,
parents of children with the strongest connections to nature
also spent a lot of time outdoors during childhood, engaging in
experiences that they believe helped to shape their adult lives
and spirituality.
The National Wildlife Federation (NWF) even compiled a
revealing list of facts that shows just how important outdoor
time in green space is for children… and how detrimental
removing this inherent connection to nature may be.18
For the record, nature's benefits don't discriminate. They're
equally relevant to children and adults alike, with research
showing people with access to nature have better health,
increased levels of satisfaction, lower
stress, and greater well-being.
Outdoor play increases fitness levels, fights
obesity, and builds healthy bodies. |
Spending time outside raises levels of vitamin D,
helping to protect children from heart disease,
diabetes, bone problems, and more. |
Time outdoors improves distance vision and lowers
the chance of nearsightedness. |
Schools with environmental education programs score
higher on standardized tests in math, reading, writing,
and listening. |
Exposure to environment-based education improves
students' critical thinking skills. |
Children's stress levels fall within minutes of
seeing green spaces. |
Play protects children's emotional development while
loss of free time and a hurried lifestyle may lead to
anxiety and depression. |
Nature makes people nicer, enhances social
interactions, and improves value for community and close
relationships. |
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The Impact of Green Space on Your Brain
Connecting with nature can help your mental health in a
myriad of ways. A systematic review examined the impact of
gardens and outdoor spaces on the mental and physical well-being
of people with
dementia, for instance. The research suggested that garden
use, whether it be watering plants, walking through a garden or
sitting in one, lead to decreased levels of agitation or anxiety
among the patients.19
Interestingly, while spending time in a green garden may help
relieve some dementia symptoms, it may also help to reduce your
risk of developing dementia in the first place. As reported by
CNN:20
"Two separate studies that followed people in their
60s and 70s for up to 16 years found, respectively, that
those who gardened regularly had a 36 percent and 47 percent
lower risk of dementia than non-gardeners, even when a range
of other health factors were taken into account. These
findings are hardly definitive, but they suggest that the
combination of physical and mental activity involved in
gardening may have a positive influence on the mind."
Meanwhile, Mycobacterium vaccae is a type of bacteria
commonly found in soil. Remarkably, this microbe has been
found to "mirror the effect on neurons that drugs like
Prozac provide."21
It helps to stimulate serotonin production, helping to make
you feel happier and more relaxed. In one animal study, mice
that ingested Mycobacterium vaccae had a demonstrated
reduction in anxiety and improved learning. The researchers
noted that natural exposure to microbes by spending time
outdoors may be important for emotional health and behavior:
22
"Recent studies show that contact with tolerogenic
microbes is important for the proper functioning of
immunoregulatory circuits affecting behavior, emotionality
and health… Collectively, our results suggest a beneficial
effect of naturally delivered, live M. vaccae on
anxiety-related behaviors … supporting a positive role for
ambient microbes in the immunomodulation of animal
behavior."
Green Space Is Great for Grounding
The next time you go outdoors, take off your shoes and spend
some time
walking barefoot in the grass, sand or mud. The Earth
carries an enormous negative charge. It's always electron-rich
and can serve as a powerful and abundant supply of antioxidant
and free-radical-busting electrons. Your body is finely tuned to
"work" with the Earth in the sense that there's a constant flow
of energy between your body and the Earth. When you put your
bare feet on the ground, you absorb large amounts of negative
electrons through the soles of your feet.
The effect is sufficient to maintain your body at the same
negatively charged electrical potential as the Earth. This
simple process is called "grounding" or "earthing," and its
effect is one of the most potent
antioxidants we know of.
Grounding has been shown to relieve pain, reduce
inflammation, improve sleep, enhance wellbeing, and much, much
more. When you wear rubber- or plastic-soled shoes, however, you
are effectively shielding yourself from this beneficial influx
of electrons from the Earth.
Simply by getting outside, barefoot, touching the Earth, and
allowing the excess charge in your body to discharge into the
Earth, you can alleviate some of the stress continually put on
your system. Walking barefoot can help ameliorate the constant
assault of electromagnetic fields and other types of radiation
from cell phones, computers, and Wi-Fi. It's also thought that
grounding may actually facilitate the formation of
structured water in your body.
Furthermore, grounding also calms your sympathetic nervous
system, which supports your heart rate variability. And, when
you support heart rate variability, this promotes homeostasis,
or balance, in your autonomic nervous system. This is important
because anytime you improve your heart rate variability, you're
improving your entire body and all its functions.
Be a Role Model to Help Your Child Spend More Time in Green
Spaces
Your kids are watching your every move, and if they see you
enjoying the great outdoors, they will too. Encourage your
children to engage in activities that are naturally interesting
to them, such as playing on the monkey bars, rollerblading,
skateboarding, playing basketball with friends, or helping you
in the garden. Organized sports are great, but so are
spontaneous romps through mud puddles, climbing trees, and
spotting frogs in a nearby creek.
Opportunities to grow and appreciate nature are everywhere,
so try to encourage your child's natural curiosity and sense of
exploration by identifying birds on the way to the bus stop,
talking about the insects you see around your yard, or helping
your child plant a small flower or
vegetable garden. Above all, resist the urge to overly
structure your child's outdoor time, instead encouraging natural
active play, time together as a family, as well as respect and
appreciation for the outdoor world.
© Copyright 1997-2015 Dr. Joseph Mercola. All Rights Reserved.
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