Spending time outdoors can provide significant benefits for both physical and mental health, according to Amanda Beaver, a registered dietitian at Houston Methodist. As modern lifestyles increasingly keep people indoors and focused on screens, experts highlight the value of reconnecting with nature.
“Spending time in nature is one of the easiest, most accessible ways to boost your physical and mental health, and it’s free,” Beaver said.
Biologists and psychologists suggest that humans are naturally inclined to connect with the outdoors. “We were meant to be outside,” Beaver explained. “In the last few hundred years, we’ve shifted to spending most of our time indoors, and our bodies feel that difference.”
Research indicates that exposure to green spaces such as forests or parks can help lower blood pressure and heart rate. Studies show that regular visits—at least once a week for 30 minutes—are associated with reduced rates of hypertension and decreased reliance on blood pressure medications.
The body’s circadian rhythm, which regulates sleep-wake cycles and other essential functions, also benefits from outdoor light exposure. “When we go outside, we can get our circadian rhythm in line,” Beaver said. She noted that even short walks outside can improve sleep quality by helping align this biological clock.
Vitamin D production is another advantage of spending time outdoors. Sunlight enables the skin to produce vitamin D, which supports bone health, immune function, and mood regulation. While factors like age, skin type, location, clothing choices, seasonality, and time of day affect vitamin D synthesis, brief periods outside—even on cloudy days—can help maintain adequate levels. However, individuals should consult their dermatologist or primary care physician about safe sun exposure practices due to risks like sunburn or skin cancer.
The immune system may also receive a boost from nature. Exposure to phytoncides—compounds released by trees—can increase activity in Natural Killer (NK) cells that defend against infections. Research has shown this effect can last up to 30 days after spending several days in a forest environment. Additionally, hospital patients with views of nature have been observed to recover more quickly after surgery than those without such views.
Mental health improvements are another reason experts encourage outdoor activity. A study found that a 90-minute walk in nature reduced brain activity linked to depression. “There are many positive mental health boosts to spending time in nature,” Beaver said. “We see an increase in awe and wonder, focus and attention. We also see creativity go up because our brains finally have a chance to be free of to-do lists and ruminating on our worries.”
Nature may enhance cognitive performance by improving focus and attention span—a phenomenon some neuroscientists attribute to “attention restoration.” According to Beaver: “We’re all so glued to our phones… We can’t focus for long periods of time without instant stimulation like we used to.” Studies support the idea that natural environments help recharge attention resources depleted by constant multitasking.
Cortisol levels—the body’s main stress hormone—can decrease after as little as 15 minutes spent outdoors. This reduction is accompanied by increases in serotonin and dopamine levels; both chemicals contribute positively to mood regulation.
Time spent in natural settings has also been linked with increased creativity and problem-solving skills: “Nature gives your brain space to breathe,” Beaver explained.
Beyond individual benefits, being outdoors helps foster social connections through shared experiences such as walking together or simply greeting others along trails. Noticing small positive moments—or “glimmers”—in nature can promote feelings of safety and connection with others: “Nature is a primo place to find glimmers that make you feel safe and connected,” Beaver said.
Beaver recommends aiming for two hours per week outdoors but emphasizes that every minute counts: “Spending time in nature doesn’t have to be a big hike,” she said. Simple activities like mindful walks or grounding exercises can offer meaningful benefits even when done briefly each day.
While disconnecting from technology is encouraged during outdoor activities, certain apps may enhance the experience by helping users identify plants or birds or discover new trails nearby.
For residents of Houston seeking local options for outdoor recreation, parks such as Buffalo Bayou Park, Hermann Park, Memorial Park—and several others across different city regions—offer opportunities for immersion in green spaces close to home.
“Houston may not have mountains,” Beaver concluded,” but it has incredible green spaces where you can feel immersed in nature.”
Every moment spent outside contributes positively toward well-being—from short walks around the neighborhood block to longer excursions into local parks.
