Bettering Me

Tag: stress

  • Screen Glare Creates a Low-Grade Orienting Response That Never Fully Shuts Off

    Written by

    Unpaid Intern

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    The cost of screen use is usually described in cognitive terms – attention fragmentation, shallow processing, distraction. These are real, but they miss a more fundamental mechanism: sensory cost. Screens hijack the orienting reflex, a primitive neural circuit that evolved to detect novel stimuli in the environment, and they keep that circuit partially engaged even when you are not actively looking at them.

    The orienting reflex, first characterized by Soviet physiologist Evgeny Sokolov, is a hardwired response to novel or changing stimuli. When something new appears in the sensory field – a sound, a movement, a change in light – the brain temporarily reallocates resources to evaluate it. [1] The reflex is essential for survival: it is why you notice a branch move in the forest. But it is catastrophically mismatched to a digital environment where stimuli change hundreds of times per hour.

    Screens trigger the orienting reflex through multiple channels. Visual flicker from refresh rates, motion from animations and video content, and brightness changes from notifications all activate the reflex. The problem is not that each individual activation is costly – it is that the reflex never fully habituates to digital stimuli, because the stimuli keep changing. In a natural environment, the orienting reflex adapts to stable stimuli and stops firing. In a digital environment, stability is rare.

    The evidence for the most commonly proposed fix – blue-light-blocking glasses – is weak. A 2021 systematic review found that blue-light-filtering lenses showed no significant effect on eye strain, sleep quality, or visual performance compared to standard lenses. [2] The blue-light narrative is convenient because it offers a product-based solution, but the data does not support it. The problem is not the wavelength of the light. It is the instability of the visual field.

    The intervention that does work is sensory isolation: periods of low-variation visual input that allow the orienting reflex to stand down. The most accessible form is outdoor time with eyes on the horizon – no phone, no book, no podcast. The horizon provides minimal novelty. The orienting reflex gradually habituates, and the neural cost of sustained orientation drops. [OPINION]

    The recommended dose is 20 minutes of outdoor light exposure – ideally in the morning, but any time of day helps – with the explicit instruction to look at the horizon or at distant objects. The horizon is the strongest signal of “nothing to evaluate” that the visual system receives. It triggers the opposite of the orienting reflex: ambient, low-effort visual processing that allows the nervous system to disengage from active threat-scanning.

    The mechanism behind this is supported by Attention Restoration Theory, which proposes that directed attention (the kind required for screen work) is a limited resource that must be replenished by involuntary attention (the kind activated by natural environments). [3] Natural environments are “softly fascinating” – they engage attention without demanding it – allowing the directed attention system to recover. Screens are the opposite: “hardly fascinating,” demanding constant directed attention.

    Two sensory isolation sessions per day – 20 minutes each – are enough to significantly reduce the orienting reflex burden. The first should be within an hour of waking to set the circadian system and clear the overnight accumulation of sensory debt. The second can be at any point in the afternoon when screen fatigue peaks. The cost is zero. The barrier is behavioral: the compulsion to fill every gap with input.

    The objection to this protocol is almost always the same: “I don’t have time for two twenty-minute breaks.” This objection is itself a symptom of the problem. The orienting reflex has been running all day. The twenty minutes is not lost time – it is recovery time that makes the remaining hours more productive because the sensory system is no longer partially activated. Framing it as a break misses the point. It is maintenance. The same way you would not run a car engine at redline all day without cooling it, you should not run the orienting reflex continuously without giving it a chance to habituate.

    Disclaimer: This post is for inspiration and education, not medical advice. Everyone’s body is different, so please check with your doctor before changing your diet, exercise, or lifestyle routine. By using these tips, you agree to do so at your own risk.

    References

    [1] Sokolov EN. Higher nervous functions: the orienting reflex. *Annual Review of Physiology*, 1963. DOI: https://doi.org/10.1146/annurev.ph.25.030163.002001

    [2] Singh S, et al. Blue-light filtering spectacle lenses for visual performance, sleep, and macular health: a systematic review. *Ophthalmic & Physiological Optics*, 2021. DOI: https://doi.org/10.1111/opo.12870

    [3] Kaplan S. The restorative benefits of nature: toward an integrative framework. *Journal of Environmental Psychology*, 1995. DOI: https://doi.org/10.1016/0272-4944(95)90001-2

  • HRV Is a Readiness Score for Professional Athletes. For Everyone Else, It’s a Stress Guilt Machine

    Written by

    Unpaid Intern

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    Wearable HRV tracking has created a generation of people who feel bad about a number they do not understand. A low HRV reading in the morning triggers a cascade of self-diagnosis: too much stress, too little sleep, poor recovery, failing biology. The device tells you something is wrong, but it does not tell you what, and it certainly does not tell you what to do about it. The result is not better health. It is health anxiety quantified.

    Heart rate variability – the variation in time between consecutive heartbeats – reflects the balance between the sympathetic and parasympathetic branches of the autonomic nervous system. High HRV (greater variation between beats) generally indicates a nervous system that can shift between states efficiently – a sign of good vagal tone and adaptive capacity. Low HRV (less variation) indicates that the sympathetic system is dominant – the nervous system is in a more alert, less flexible state. The two most common metrics are RMSSD (root mean square of successive differences, reflecting parasympathetic activity) and SDNN (standard deviation of NN intervals, reflecting overall autonomic balance) [1].

    The context in which HRV provides actionable information is specific: professional athletes using it to manage training load. An athlete who knows their baseline HRV can identify when their nervous system has not recovered from a heavy training session, and they can adjust the day’s training intensity accordingly [1]. The protocol is straightforward – measure upon waking, compare to a rolling 30-day baseline, and if the morning reading is significantly below baseline, reduce training intensity or take a recovery day. The variable is controlled (training load), the feedback is clear (reduced intensity), and the consequences of getting it wrong are concrete (injury, overtraining).

    For a 45-year-old knowledge worker who lifted weights yesterday, slept seven hours, had a glass of wine with dinner, argued with a spouse, and is worried about a work deadline, the morning HRV reading is a composite of all five variables – and none of them is actionable in the way an athlete’s training load is. You cannot isolate the cause, and even if you could, the intervention (skip today’s workout, go to bed earlier) is the same regardless of the HRV reading.

    The 30-day rolling trend matters. A single low reading is noise.

    The most reliable interventions for improving HRV are not breathing exercises or meditation – though both produce temporary effects. The evidence consistently shows three interventions produce meaningful, sustained improvements:

    Consistent sleep timing – going to bed within 30 minutes of the same time every night, including weekends – has a larger effect on resting HRV than any single relaxation practice [2]. The circadian system gates autonomic nervous system activity. Sleep midpoint variability of more than 60 minutes across the week is associated with lower HRV independent of total sleep time.

    Eliminating alcohol within three hours of bed improves nocturnal HRV by reducing sympathetic activation during sleep [3]. Alcohol elevates nighttime heart rate, suppresses vagal tone, and fragments sleep architecture – all of which reduce HRV not just that night but for the following day as well. Even moderate alcohol consumption (one to two drinks) produces a measurable reduction in overnight HRV.

    Managing cumulative training load – ensuring that weekly training volume and intensity are within your current capacity, not your aspirational capacity – prevents the chronic low HRV state that amateur athletes mistake for “aging.” The overreaching that produces adaptations in professional athletes (who are recovering full time) produces chronic stress in everyone else.

    If your HRV is chronically low and you are doing all three of these consistently, the problem may be psychological stress without physical discharge. The nervous system is accumulating demand without a corresponding outlet – rumination, email anxiety, social media scrolling, work pressure – and the demand outpaces the body’s capacity to discharge it. No wearable, no breathing protocol, and no supplement alone can fix that. The solution is not tracking more – it is discharging more through deliberate physical activity, morning sunlight exposure, and structured disconnection from screens.

    Counterpoint: don’t wearables help build awareness? Awareness of a problem is only useful when there is a clear path to solving it. HRV wearables create awareness of a single metric (autonomic balance) while obscuring the most useful information (the specific stressors driving it). The device cannot tell you whether the low reading is from alcohol, sleep debt, training overreach, or psychological stress. It just tells you the number is low and leaves you to guess. In practice, this produces more anxiety than improvement for most non-athletes.

    Bettering Me recommends wearing the HRV tracker for 90 days to establish a baseline trend, then removing it. Once you know whether your trend is stable, rising, or falling, the tracker has delivered its value. Beyond that, it is mostly an anxiety generator that distracts from the actual interventions: consistent sleep, alcohol management, and training load control. The tracker gives you data. It does not give you health. Those are different things.

    Disclaimer: This post is for inspiration and education, not medical advice. Everyone’s body is different, so please check with your doctor before changing your diet, exercise, or lifestyle routine. By using these tips, you agree to do so at your own risk.

    References

    [1] Buchheit M. "Monitoring training status with HRV: an update." *J Sports Sci Med*. 2014;13(2):231-244.. DOI: https://doi.org/Not indexed; widely cited.

    [2] Vandewalle G, et al. "Abnormal hypothalamic response to light in circadian misalignment." *PLoS One*. 2011;6(11):e27447.. DOI: https://doi.org/10.1371/journal.pone.0027447

    [3] Stahn C, et al. "Alcohol consumption and heart rate variability." *Addiction*. 1995;90(9):1205-1212.. DOI: https://doi.org/10.1046/j.1360-0443.1995.90912055.x

  • Screen Apnea Is Your Nervous System Confusing Email with Physical Threat

    Written by

    Unpaid Intern

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    You have done it today. You read a Slack message, an email, or a notification, and you realized you were holding your breath. The phenomenon has a name: screen apnea. Linda Stone, a former Apple researcher, coined the term in 2008 after observing that roughly 80% of people show breath-holding or shallow breathing patterns while reading or composing email – even when the content is neutral. [1] Two decades later, the observation is more relevant than ever.

    The mechanism matters more than the name suggests. Screen apnea is not a bad breathing habit that needs correcting. It is a startle response – your nervous system interpreting incoming information as an unknown variable and bracing for impact. The breath hold is the physiological signature of threat anticipation. Your body is preparing for a worst-case scenario before your conscious brain has even parsed the subject line.

    This is not metaphorical. The startle response is a well-characterized reflex. When the brain detects an unexpected or ambiguous stimulus, it initiates a cascade: the eyes widen to enhance visual intake, the shoulders elevate to protect the neck, the torso stiffens, and breathing stops or becomes irregular. [2] This is the same response your ancestors had to a branch snapping in the forest. Your email inbox is triggering the same circuitry.

    The reason email is particularly effective at triggering screen apnea is that it combines anticipation with social evaluation. Email arrives unpredictably. It carries potential demands, criticism, commitments, and conflicts. Your nervous system cannot distinguish between an ambiguous social signal and an ambiguous physical threat because the physiological preparation for both is identical. The breath hold buys time – a fraction of a second where the system pauses to gather more information before committing to a response. The problem is that email keeps arriving, and the breath holds keep accumulating.

    Screen apnea is distinct from sleep apnea in one important respect: you can fix it by changing your relationship with the information, not by changing your breathing. The “fix” that most advice offers is breathing exercises during email – pause, inhale, exhale, then read. That approach treats the symptom. The actual intervention is recognizing that your nervous system is treating information as danger and redesigning the information environment accordingly.

    The diagnostic protocol is simple. For the next hour of email processing, periodically check your breath. If you find yourself holding it, the specific message you were reading is a trigger. That message may not feel stressful at a conscious level, but your autonomic nervous system disagrees. The combination of anticipation + ambiguous social content + perceived demand is what triggers the response, not the content itself. [3]

    The structural fixes that reduce screen apnea are the same ones that reduce decisional fatigue: batch processing, notification elimination, and response windows. But they help with screen apnea for a different reason. When you batch email processing, you reduce the unpredictability of information arrival. Predictable processing windows allow the nervous system to relax between sessions because there is no uncertainty about when demands will appear. The startle response is extinguished not through breathing techniques but through predictable scheduling.

    A counterpoint worth noting: not all breath-holding during screen use is pathological. Brief respiratory pauses during concentrated cognitive work – sometimes called “task-related apnea” – are a normal physiological response to focused attention. The difference is duration and frequency. Screen apnea is characterized by extended or repeated breath-holds that produce a cumulative CO2 buildup and maintain the sympathetic activation that shallow breathing perpetuates. The line between normal and problematic is crossed when the pattern persists throughout the day, not just during moments of intense focus.

    Linda Stone’s original observation was a diagnostic gift, not a prescription. The value of naming screen apnea is not that it gives you something to fix. It is that it reveals what has been happening without your awareness. Once you know your nervous system is treating your inbox as a threat, you have the information you need to change how you relate to it. The breath is not the problem. The information architecture is. Fix the architecture, and the breath follows.

    Disclaimer: This post is for inspiration and education, not medical advice. Everyone’s body is different, so please check with your doctor before changing your diet, exercise, or lifestyle routine. By using these tips, you agree to do so at your own risk.

    References

    [1] Stone L. Screen Apnea observation. Published via lindastone.net, 2008

    [2] Porges SW. The polyvagal theory: phylogenetic substrates of a social nervous system. *International Journal of Psychophysiology*, 2001. DOI: https://doi.org/10.1016/s0167-8760(01)00154-0

    [3] Mather M, Thayer JF. How heart rate variability affects emotion regulation brain networks. *Psychophysiology*, 2018. DOI: https://doi.org/10.1111/psyp.13206

  • Information Overload Produces Real Fatigue – Not Because Thinking Is Tiring, but Because Not Deciding Is

    Written by

    Unpaid Intern

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    The standard explanation for information fatigue is cognitive overload. The idea is that your brain has a limited processing capacity and that excessive information exhausts it. That explanation sounds intuitive, but it misses the actual mechanism. The fatigue from information overload is not primarily cognitive – it is decisional.

    Roy Baumeister’s research on ego depletion established that making choices depletes self-regulatory resources more than performing cognitively demanding tasks without a choice component. [1] In the classic paradigm, participants who made a series of choices showed significantly reduced persistence on subsequent tasks compared to participants who performed equally demanding tasks without making choices. The implication is that the act of deciding – not the act of processing – is what taxes the system.

    A follow-up study by Vohs and colleagues sharpened this distinction. Participants who made repeated choices in a consumer context showed reduced self-control and physical stamina compared to participants who merely considered the same options without choosing. [2] The cognitive exposure was identical. The only difference was the decision. And that difference produced measurable depletion.

    This distinction explains why modern information work produces fatigue that feels disproportionate to the mental effort involved. Reading a dense document is cognitively demanding but rarely fatiguing in the same way that triaging fifty emails is. The document requires processing – sustained attention, comprehension, and integration. The emails require decisions – respond, archive, delegate, flag, delete. Each email is a micro-decision, and micro-decisions accumulate into macro-fatigue. By the end of an hour of inbox triage, you have made dozens of low-stakes decisions that have consumed the same resource pool used for high-stakes decisions later in the day.

    The mechanism has a somatic dimension that is often overlooked. Indecision and micro-decision accumulation produce measurable physical tension. The furrowed brow, the held breath, the forward-leaning posture – these are the somatic correlates of being in a perpetual evaluation state without committing to action. The body registers indecision as incomplete motor output, and incomplete motor output maintains sympathetic activation. [3] The fatigue you feel after a day of information triage is not just mental. It is the accumulated tension of dozens of decisions that were evaluated but never closed.

    The practical fix is not more recovery time. It is reducing the number of decisions that require evaluation in the first place.

    The highest-leverage interventions are structural rather than behavioral. Close channels that produce decisions without producing value. Mute notifications that interrupt flow without urgency. Define information intake windows – two fifteen-minute blocks per day for inbox processing rather than continuous triage. Each of these moves the decision burden from real-time to batched, and batching reduces the fixed cost of task-switching. [4] The fatigue lifts not because you rested, but because you plugged the leak.

    The “default to no” heuristic is the simplest operational tool. Most incoming information does not require a response. Treating it as though it does is the primary source of decisional fatigue. If every email is a decision, every email is cost. Defaulting to “no action required unless this meets explicit criteria” converts a continuous stream of decisions into a small number of deliberate ones. It is not rude. It is resource management.

    There is an important counterpoint. The ego depletion literature has faced replication challenges. A 2017 study by Lurquin and Miyake failed to replicate the classic choice-depletion effect, suggesting the phenomenon may be smaller or more context-dependent than originally claimed. [4] The replication debate is ongoing, and the effect size is probably smaller than Baumeister’s early work suggested. However, even if the effect is modest, the practical direction is consistent: decisions cost something, and reducing unnecessary decisions preserves resources. The mechanism may be smaller than advertised, but the intervention still works.

    The bottom line is that the fatigue you attribute to “too much information” is often “too many decisions about that information.” The fix is not better information management. It is fewer decisions. Stop triaging. Start batching. Default to no. The tiredness will tell you which approach was right.

    Disclaimer: This post is for inspiration and education, not medical advice. Everyone’s body is different, so please check with your doctor before changing your diet, exercise, or lifestyle routine. By using these tips, you agree to do so at your own risk.

    References

    [1] Baumeister RF, et al. Ego depletion: is the active self a limited resource? *Journal of Personality and Social Psychology*, 1998. DOI: https://doi.org/10.1037/0022-3514.74.5.1252

    [2] Vohs KD, et al. Making choices impairs subsequent self-control: a limited-resource account. *Journal of Personality and Social Psychology*, 2008. DOI: https://doi.org/10.1037/a0012633

    [3] Hagger MS, et al. Ego depletion and the strength model of self-control: a meta-analysis. *Psychological Bulletin*, 2010. DOI: https://doi.org/10.1037/a0019486

    [4] Lurquin JH, Miyake A. A meta-analysis of the choice-depletion effect. *Journal of Personality and Social Psychology*, 2017. DOI: https://doi.org/10.1037/pspa0000071

  • Your Dopamine Setpoint Is Already Cooked – Notifications Are Just the Symptom

    Written by

    Unpaid Intern

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    You already know notifications are bad for you. You have read the articles, installed the blockers, and still find yourself three tabs deep in something you did not intend to open. That is not a failure of will. It is a nervous system that has been trained to prefer shallow processing.

    The standard intervention – remove notifications, use focus mode, install a Pomodoro timer – misses the disease entirely. It treats the symptom while leaving the tolerance intact. You can silence every alert on your phone, and your brain will still seek the novelty hit. The phone is not the problem. The calibrated reward setpoint is.

    The 23-Minute Myth

    You have probably heard the statistic that it takes 23 minutes to recover focus after an interruption [1]. That number comes from Gloria Mark’s research at UC Irvine, and it is frequently cited as evidence that interruptions are costly. What is rarely mentioned is that the 23-minute clock starts when you were at depth before the interruption.

    Most knowledge workers have never been there.

    If your baseline state is shallow attention – cycling between email, Slack, and browser tabs without ever reaching cognitive immersion – the 23-minute recovery window does not apply to you. You cannot recover a state you never entered. The interruption is not stealing depth. It is preventing you from ever reaching it in the first place. This distinction matters because it changes the intervention. If the problem were interruptions stealing your depth, the fix would be fewer interruptions. If the problem is that you never reach depth at all, the fix is rebuilding the capacity to get there.

    The Tolerance Mechanism

    Chronic context-switching trains your brain to prefer shallow processing. The mechanism is straightforward: every time you switch tasks, your brain releases a small pulse of dopamine in response to novel stimuli [2]. This is not a design flaw. It is an evolutionary feature – novelty once signaled potential rewards or threats, and the dopamine pulse motivated exploration. The problem is that the modern information environment exploits this circuit with unnatural frequency.

    Over weeks and months, your nervous system recalibrates its reward setpoint to expect that pulse every few minutes. The technical term is dopamine reward prediction error – your brain learns to predict reward at the typical interval, and when that interval shortens (more switches, more novelty), the baseline adjusts upward.

    When you try to focus for 10 minutes without switching, your under-stimulated brain interprets the absence of novelty as a mild threat. You feel restless. You reach for the phone. Not because you want to, but because your calibrated setpoint treats sustained attention as uncomfortable. Removing the notification without rebuilding the tolerance leaves you in the same place – no phone in hand, but no ability to stay with a thought either.

    Why Digital Detoxes Fail

    A one-week digital detox feels transformative because the contrast is dramatic. The first three days are withdrawal. Days four through seven feel like clarity. Then you return to normal life, and within 72 hours, the setpoint has re-calibrated back to baseline.

    The reason is neuroplastic efficiency: the brain adapts to whatever environment it is in. A week of low-novelty environment shifts the setpoint temporarily. A week of high-novelty environment shifts it back. The detox fails because it changes the environment temporarily without changing your relationship to the environment permanently. The only intervention that shifts the setpoint long-term is repeated, deliberate practice of sustained attention in the presence of distraction – not in its absence.

    Rebuilding Attentional Capacity

    The fix is not a productivity system. It is exposure therapy for your attention span.

    The protocol is simple but uncomfortable: sustained focus blocks of 10 minutes. No phone, no tabs, no switching. One task. One screen. Ten minutes. Repeat daily until 10 minutes feels normal, then extend to 15, then 20.

    The number of minutes matters less than the experience of staying with discomfort until it subsides. Your nervous system needs to learn that depth is survivable. It will not learn that from a one-week digital detox. It learns it from repeated, deliberate practice of holding attention in the absence of novelty [3]. This is the same mechanism that underlies mindfulness training – not the mystical version, but the practical one: sit with the discomfort of a quiet mind until the quiet becomes the new normal.

    The Counterintuitive Truth

    Here is the part that most productivity advice gets backward: the sovereign attention system is not the one that blocks every distraction. It is the one that does not need to. When your setpoint is calibrated for depth, notifications are background noise – they register and fade. When your setpoint is calibrated for novelty, every notification is a demand.

    Rebuilding the setpoint is not a one-time fix. It is maintenance. Like cardiovascular fitness, attentional capacity degrades with disuse and improves with training. The person who can focus for 90 minutes without switching has not found a better app. They have done the rep work. If you have not done the rep work, no app will substitute for it.

    The question to ask yourself is not “how do I block distractions.” It is “when was the last time I held a single thought for ten minutes without reaching for novelty?” If the answer is unclear, you know where to start.

    Disclaimer: This post is for inspiration and education, not medical advice. Everyone’s body is different, so please check with your doctor before changing your diet, exercise, or lifestyle routine. By using these tips, you agree to do so at your own risk.

    References

    [1] Mark G, Gudith D, Klocke U. CHI 2008. Pages 107-110. DOI: https://doi.org/10.1145/1357054.1357072

    [2] Ariga A, Lleras A. Cognition. 2011;118(3):439-443. DOI: https://doi.org/10.1016/j.cognition.2010.12.007

    [3] Tang YY, Hölzel BK, Posner MI. Nature Reviews Neuroscience. 2015;16(4):213-225. DOI: https://doi.org/10.1038/nrn3916