Meditation has proven benefits, but the style that works best depends on a person's habits and preferences. In this episode of The Science of Happiness, we explore walking meditation, a powerful practice for feeling more centered and grounded. Dan Harris, host of the award-winning 10% Happier podcast, shares how walking meditation helps him manage the residual stress and anxiety from years of war reporting and high-pressure TV anchoring.

Learn how the technique of mental noting unwinds anxiety, reduces our reactivity and anchors us in our calm center.

We’ll be fidgety. As soon as we attempt to sit still, during meditation or any other time, it’s almost as if we can’t help but scratch an itch, stretch our neck, or cross and uncross our legs.

“The type of meditation matters,” explain postdoctoral researcher Bethany Kok and professor Tania Singer. “Each practice appears to create a distinct mental environment, the long-term consequences of which are only beginning to be explored.” How much meditation is enough? That also depends. This isn’t the answer most people want to hear. Many of us are looking for a medically prescriptive response (e.g., three times a week for 45-60 minutes), but the best guide might be this old Zen saying: “You should sit in meditation for twenty minutes every day—unless you’re too busy. Then you should sit for an hour.” To date, empirical research has yet to arrive at a consensus about how much is “enough.

Mindfulness is good for our bodies: A seminal study found that, after just eight weeks of training, practicing mindfulness meditation boosts our immune system’s ability to fight off illness. Practicing mindfulness may also improve sleep quality.

For example, drug addictions, at heart, come about because of physiological cravings for a substance that relieves people temporarily from their psychological suffering. Mindfulness can be a useful adjunct to addiction treatment by helping people better understand and tolerate their cravings, potentially helping them to avoid relapse after they’ve been safely weaned off of drugs or alcohol. The same is true for people struggling with overeating.

Once you finish this practice and get ready to start working, mindfulness can help increase your effectiveness. Two skills define a mindful mind: focus

While you often hear about “clearing your mind” through meditation, the truth is you can’t really clear or empty your mind. Thinking is what these big ol’ brains of ours do! And stopping thinking isn’t the goal of meditation, anyway—not getting caught up in those thoughts is.

While we may espouse compassionate attitudes, we can also suffer when we see others suffering, which can create a state of paralysis or withdrawal. Many well-designed studies have shown that practicing loving-kindness meditation for others increases our willingness to take action to relieve suffering. It appears to do this by lessening increase your vibration amygdala activity in the presence of suffering, while also activating circuits in the brain that are connected to good feelings and love. For longtime meditators, activity in the “default network”—the part of our brains that, when not busy with focused activity, ruminates on thoughts, feelings, and experiences—quiets down, suggesting less rumination about ourselves and our place in the world.

Mindfulness changes our brains: Research has found that it increases density of gray matter in brain regions linked to learning, memory, emotion regulation, and empathy.

Those who took the mindfulness program showed significant improvements on the six-minute walking test (a measure of cardiovascular capacity) 528 hz and slower heart rates than those in the waitlist group.

Loving-kindness meditation, which the GGSC’s Christine Carter explains in this post, involves extending feelings of compassion toward people, starting with yourself then branching out to someone close to you, then to an acquaintance, then to someone giving you a hard time, then finally to all beings everywhere.

Participants also reported that they became more assertive in saying ‘pelo’ to vibration raising others in order to lessen their load of responsibility, allowing them to become more balanced in acknowledging their own as well as others’ needs.

Taken together, the studies suggest that mindfulness may impact our hearts, brains, immune systems, and more. Though nothing suggests mindfulness is a standalone treatment for disease nor the most important ingredient for a healthy life, here are some of the ways that it appears to benefit us physically.