The Overflowing Cup and Your Nervous System
By: Dr. Katie Wadland, PT, DPT, Board-Certified Geriatric Clinical Specialist, Owner: Healthy Aging Physical Therapy
I went to yoga this morning, in an attempt to regulate nervous system after a week of solo parenting while my husband was out of town. Normally, I can balance all the regular demands of my life, which as a mother, caregiver, business owner, and home owner, are many. But with him away, the balance shifts. Suddenly, it’s double the drives to the pool for swim team, only one man on deck for the morning routine, and each meal and clean up falls to yours truly. By the end of the week, my metaphorical ‘nervous system cup’ was overflowing; while I meet all the needs of my business, my kids and my home on weeks like this, I frequently deprioritize my own needs, failing to get enough water, proper nutrition, exercise or rest. While I know the cycle well, it’s still hard for me to maintain a good balance when something like this tips the scales. During my much-needed yoga session this morning, I got thinking about how interesting it is that while this phenomenon, and the resulting impact on our bodies and nervous systems is so universal, the triggers and manifestations differ from person to person. The good news is that while our own experiences of stress, overwhelm and exhaustion may differ, the ‘treatment’ is relatively simple, evidenced-based, and enjoyable. The first step is understanding your nervous system:
The Overflowing Cup Metaphor
Think of your nervous system as a cup. When it’s half full, it has room to absorb life’s stressors or give more to those around you. But when your cup is full—due to stress, pain, life’s demands or a physiologic change like an illness—even a small addition of water overflows it. As I mentioned, our individual manifestations are varied, but often lead to symptoms like fatigue, brain fog, or heightened emotional responses. Dysregulation activates the body’s "fight or flight" mode, flooding it with cortisol.
Chronic elevations of cortisol have wide-ranging effects on health. Prolonged stress and high cortisol levels can lead to systemic inflammation, insulin resistance, hypertension, and impaired immune function, ultimately increasing the risk of chronic diseases such as cardiovascular disease, diabetes, and autoimmune disorders. There is no lack of evidence in this area. Research published in Frontiers in Endocrinology emphasizes the connection between chronic stress and metabolic disorders, while findings from the National Institute on Aging highlight the role of cortisol in neurodegenerative diseases, such as Alzheimer’s.
Even if you’re "managing" well and the impacts of dysregulation haven’t yet caused physiological change, a dysregulated nervous system simply feels crappy. It leaves you less efficient in your work, less present in your relationships, and unable to be the best version of yourself. When your nervous system is dysregulated, it’s harder to focus, connect, and enjoy the things that matter most. Prioritizing nervous system regulation is not just about avoiding future health issues; it’s about improving your day-to-day experience of life. It’s about creating more space in your cup so you can thrive, not just survive.
Dysregulation in Chronic Pain, Fear of Falling, and Parkinson’s Disease
Many of the patients we see in our practice experience nervous system dysregulation, often as part of a broader health condition. These patients show patterns of heightened stress response that exacerbate their primary symptoms. Whether it’s chronic pain, fear of falling, or neurological conditions like Parkinson’s disease, the effects of dysregulation can significantly worsen their quality of life. Below are some specific examples and approaches for nervous system regulation in these populations.
Chronic Pain
Patients with chronic pain often live with a nervous system in overdrive. Long-term exposure to pain can cause the brain to become hypersensitized, interpreting even minor stimuli as significant threats. This constant activation of the sympathetic nervous system amplifies pain and perpetuates a cycle of stress and physical discomfort. Gentle movement, mindfulness-based stress reduction, and diaphragmatic breathing can help calm this cycle, retraining the brain to regulate pain responses more effectively.
Fear of Falling
In older adults, the fear of falling is not just psychological—it’s a full-body response that often keeps patients trapped in a state of hypervigilance. This fear increases muscle tension, disrupts balance, and raises the risk of further falls. Patients in this state frequently withdraw from physical activity, which only worsens functional decline. Interventions such as balance training, slow-paced walking, and grounding techniques can help mitigate these responses and restore confidence.
Parkinson’s Disease
For individuals with Parkinson’s, nervous system dysregulation exacerbates motor and non-motor symptoms, including tremors, freezing, and cognitive challenges. Stress often worsens these symptoms, creating a feedback loop that further destabilizes the nervous system. In these patients, incorporating aerobic exercise, yoga, and social connection into their routines can help regulate the nervous system and improve both physical and mental outcomes.
Evidence-Based Tools for Regulating the Nervous System
Nervous system regulation is key to maintaining physical, mental, and emotional balance. The key to regulating your nervous system isn’t always about eliminating stressors—because often, we can’t. We can’t always reduce our demands, get rid of our chronic diseases, or eliminate every source of stress. Instead, it’s about building a bigger cup. When we do things that increase our capacity, the same amount of water—the same stressors—can fit without overflowing. By expanding our nervous system’s capacity (otherwise known as our resilience), we can absorb more challenges without triggering the negative effects of dysregulation. Below is a list of simple, easy-to-incorporate strategies that are backed by research. These practices can help you expand your capacity, regulate your nervous system, and create more balance in your life.
1. Breathwork
Breathwork practices such as diaphragmatic breathing, box breathing, or the 4-7-8 method stimulate the vagus nerve and activate the parasympathetic nervous system. These techniques reduce heart rate, lower blood pressure, and counteract the effects of the "fight or flight" response. Controlled breathing has been shown to significantly reduce stress by shifting the autonomic balance to favor parasympathetic activity. For some easy-to-follow videos and tips on breathwork, check out the resources on our website here.
2. Mindfulness and Meditation
Mindfulness meditation helps bring attention to the present moment and reduces stress hormones like cortisol. Techniques like the 5-4-3-2-1 grounding method are particularly effective during acute stress. Studies, including those supported by the NIH, show that mindfulness can lower inflammation, improve emotional regulation, and enhance the nervous system's ability to adapt to stress. For a step-by-step guide to the 5-4-3-2-1 method, check out our resources here.
3. Physical Activity
Exercise, particularly rhythmic and moderate-intensity activities such as yoga, walking, or swimming, helps regulate the nervous system by releasing endorphins and improving brain plasticity. It also enhances heart rate variability (HRV), a key marker of parasympathetic activation. Research from the National Institute on Aging highlights that consistent physical activity supports the body’s stress recovery mechanisms, making it a powerful tool for nervous system balance.
4. Quality Sleep
Sleep is essential for nervous system health, allowing the brain to consolidate memories, process emotions, and clear out metabolic waste. Poor sleep disrupts the balance between the sympathetic and parasympathetic systems, exacerbating stress. Adopting sleep hygiene practices—consistent bedtimes, reducing screen exposure, and creating a restful environment—improves sleep quality and nervous system regulation. For comprehensive sleep hygiene tips, you can refer to the National Institute on Aging's guide here.
5. Nature Connection
Spending time outdoors in natural settings promotes grounding and nervous system regulation. Nature exposure has been shown to reduce cortisol levels and increase parasympathetic activity. A 2020 review in Frontiers in Psychology reported that "forest bathing" or similar nature-based activities improve mood, lower blood pressure, and enhance mental clarity. How easy is that? Feeling overwhelmed? Just go outside.
6. Socialization
Strong social connections play a critical role in nervous system regulation. Meaningful interactions with trusted friends or family members activate the parasympathetic system and promote emotional resilience. Research from the National Institute on Aging indicates that loneliness and social isolation are linked to heightened sympathetic nervous system activity and increased inflammation. In contrast, social bonds lower stress markers like cortisol and improve overall well-being. Group activities such as exercise classes or support groups are particularly effective in this regard. For this reason and many more, Healthy Aging loves teaching our group fitness classes. You can see where we teach on our Group Fitness page here.
Moving Forward: Make Nervous System Regulation a Priority
While we know these strategies sound simple, in reality, it’s the consistency that makes the difference—and that’s often the hardest part. The key is to start small and meet yourself where you are. Focus on adding just one thing at a time. Whether it’s five minutes of deep breathing, a short walk outside, or a single restorative yoga pose, small, consistent steps can begin to regulate your nervous system and create more room in your cup over time. Progress doesn’t have to be perfect; it just needs to start.
References
Frontiers in Psychology (2018)
Study Title: The Effects of Controlled Breathing on Stress and Autonomic Function
Annotation: This study highlights how breathwork techniques like diaphragmatic breathing and the 4-7-8 method can activate the parasympathetic nervous system and reduce stress-related symptoms.
Link: Frontiers in PsychologyNational Institute on Aging
Resource Title: Getting a Good Night's Sleep
Annotation: A comprehensive guide to sleep hygiene, detailing practical strategies to improve sleep quality and regulate the nervous system.
Link: National Institute on AgingNational Institute of Neurological Disorders and Stroke (NINDS)
Research Title: Deep Phenotyping of Neurologic Post-Acute Sequelae of SARS-CoV-2 Infection
Annotation: Explores the biological mechanisms of nervous system dysfunction, including the impact of autonomic dysregulation and immune response.
Link: NINDSTherapist Aid
Resource Title: Grounding Techniques (5-4-3-2-1 Method)
Annotation: A clear, actionable guide for using the 5-4-3-2-1 grounding method to manage acute stress and promote mindfulness.
Link: Therapist AidNational Institutes of Health (NIH)
Resource Title: Long COVID and Autonomic Dysfunction
Annotation: Details autonomic nervous system regulation and strategies for improving resilience against stress-related symptoms.
Link: NIHFrontiers in Endocrinology
Study Title: Chronic Stress and Metabolic Disorders: Insights from Recent Research
Annotation: Discusses the long-term health effects of elevated cortisol, including systemic inflammation and increased risk for chronic disease.
Link: Frontiers in Endocrinology
