What the Evidence Actually Shows Educational content only, not medical advice. Product mentions are informational and are not endorsements, and no compensation is involved. None of these products treats concussion. Graded exercise after concussion should be prescribed and supervised by a concussion-experienced clinician, since exercising above your symptom threshold can set recovery back. Consult a clinician before starting or changing an exercise program. Double-blind provocation studies consistently find that people reporting sensitivity to electromagnetic fields cannot detect whether a field is present better than chance (Rubin et al., 2010, PMID: 19681059). An earlier systematic review reached the same conclusion (Rubin et al., 2005, PMID: 15784787). Symptoms tracked what participants believed about exposure rather than actual exposure. This does not mean the symptoms are imaginary. People reporting this experience genuinely poor sleep, headache, and fatigue, and those symptoms are real and worth addressing. What the evidence does not support is the attribution to electromagnetic fields, which matters because it directs money toward shielding products that do not address the cause. Here is the useful part. Almost every practical step in a typical low-EMF bedroom protocol improves sleep for reasons that hold up independently. Removing the phone removes light, notifications, and the temptation to check it at 3am. Turning off the router at night removes a status LED and a reason to browse in bed. The changes are worth making, and the mechanism is behavioral and photic rather than electromagnetic. Sleep disturbance affects a large share of TBI survivors (Mathias & Alvaro, 2012), so getting this right matters. Prices are approximate and change frequently. Check current pricing before buying, and confirm compatibility with equipment you already own. Best Single Change: Move the Phone Out of the Bedroom Cost: free This is the highest-value change available and it costs nothing. A phone at the bedside supplies short-wavelength light at close range, notification sounds and vibrations, and a frictionless way to spend forty minutes scrolling after a 3am waking. Charging it in another room removes all three at once. What makes it work: Eliminates the brightest light source in the room Removes notification sounds and vibration during light sleep Adds enough friction to prevent middle-of-the-night scrolling Removes clock-watching, which drives anxiety about not sleeping Costs nothing and requires no equipment Limitations: Requires a separate alarm clock. Some people need the phone accessible for caregiving or emergencies, in which case do-not-disturb with an exception list is the compromise. Best Replacement Device: A Simple Analog Alarm Clock Price: approximately $10 to $25 The main obstacle to removing the phone is that it is also the alarm. A basic clock solves that. Choose one with no illuminated display, or with a dim red display and a physical dimmer, since a bright blue clock face is its own problem. What makes it stand out: Removes the last reason to keep a phone at the bedside Non-illuminated or dim red display avoids light exposure No notifications, no apps, no scrolling Works during power outages if battery-operated Cheap and requires no setup Limitations: Avoid models with bright white or blue displays, which are common. Ticking mechanisms bother some people with noise sensitivity, so silent or digital movements are preferable. Best for Light Control: Blackout Curtains or a Sleep Mask Price: approximately $25 to $80 for curtains, $10 to $30 for a mask Light control does more for sleep quality than any electromagnetic consideration. Streetlights, passing headlights, and early summer dawn all fragment sleep, and this matters more when photophobia and sleep disruption are already present after concussion. What makes it stand out: Directly addresses a documented sleep disruptor Helps with early waking during long summer daylight A contoured mask is cheaper and works while traveling No power, network, or configuration involved Benefits are immediate rather than cumulative Limitations: Full blackout can disrupt natural morning waking cues, so consider a sunrise alarm alongside. Masks bother some people, and contoured designs avoiding pressure on the eyes are better tolerated. Best Routine Change: Router on a Timer Plug Price: approximately $10 to $15 Putting the router on a timer is often recommended for electromagnetic reasons and is worth doing for a behavioral one. If the network is off, late-night browsing, streaming, and scrolling stop being options, which enforces a wind-down boundary that willpower alone rarely maintains. What makes it stand out: Enforces a device curfew without relying on self-discipline Removes a status LED if the router sits near the bedroom Applies to the whole household rather than one person Very cheap and requires no technical knowledge Easy to reverse if it does not suit Limitations: Affects other household members, so agree it first. Problematic if anyone relies on connected medical devices, smart home automations, or works late. Do not use if your hands-free lighting depends on the network. What to Skip: Shielding Products Price: often $100 to $1,000 or more Shielding canopies, paints, fabrics, and personal harmonizing devices are the products this category is built to sell. Given that provocation studies find no detection above chance and symptoms track believed exposure (Rubin et al., 2010), spending substantially on shielding is difficult to justify, and the money buys nothing the free changes above do not deliver more reliably. Why to be cautious: The premise is not supported by double-blind evidence Costs are high relative to the free changes that work Reinforcing the attribution can increase symptom focus and anxiety No product in this category is regulated for a health claim Time and money spent here delays effective assessment The honest caveat: If you have already made these changes and feel better, that benefit is real regardless of mechanism. The argument here is against spending heavily on shielding, not against your experience. How to Build the Bedroom Setup Work in order of evidence and cost. Move the phone out and buy a basic clock. Control light with curtains or a mask and eliminate every status LED in the room, including those on chargers, televisions, and smoke alarms. Set the room cool, since temperature affects sleep onset substantially. Address noise with a sound machine if needed. Put the router on a timer if late-night use is a problem. Then stop. If insomnia persists after all of this, the answer is clinical assessment rather than further environmental modification, because post-concussion insomnia often reflects circadian disruption, pain, sleep apnea, medication effects, or mood problems that respond to specific treatment. Why Post-Concussion Insomnia Needs More Than Environment Sleep disturbance is common after traumatic brain injury (Mathias & Alvaro, 2012), and it has several distinct drivers. Physiological hyperarousal keeps people exhausted but unable to switch off. Circadian timing shifts. Pain fragments sleep. Sleep apnea occurs at elevated rates. Medications used for headache and mood alter sleep architecture. Anxiety about recovery drives rumination at night. Environmental optimization helps with none of these directly, which is why a perfect bedroom does not fix post-concussion insomnia on its own and why persistent problems warrant assessment (Silverberg et al., 2020). Neck Mobility Exercises That Support Sleep Cervical tension contributes to headache and to the hyperarousal that keeps the nervous system alert at night. These exercises target that component and are well suited to doing lying down before bed. JME 14 Chin tucks address suboccipital tension, a primary driver of post-concussion headache and nervous system hyperarousal. Ten repetitions with 5-second holds. JME 1 Cervical rotation restores segmental mobility and reduces the guarding patterns common after concussion. Ten slow repetitions per direction, kept pain-free. JME 15 Cervical lateral flexion addresses side-bending restriction that sustains neck tension and referred head pain. Ten repetitions per side. JME 16 Cervical flexion and extension restore sagittal mobility restricted by protective guarding after impact. Eight slow repetitions. Advanced Exercises for Ongoing Recovery JME 2 Cervical retraction reinforces a neutral head position, reducing the postural strain that accumulates during screen use and seated exercise. Ten repetitions per set. JME 150 Thoracic rotation restores mid-back motion, which reduces compensatory load on the cervical spine during any repetitive exercise. Eight repetitions per direction. JME 227 Overhead reach opens the thoracic spine and rib cage, supporting the breathing mechanics behind nervous system regulation. Ten repetitions with controlled tempo. JME 155 Diaphragmatic breathing lowers sympathetic drive and reduces the arousal that amplifies every sensory symptom. Ten slow breaths, several times daily. Start your 3-day free trial to access joint-specific mobility routines addressing the cervical component of post-concussion symptoms. Common Mistakes With Bedroom Setup Spending heavily on shielding before making the free changes Keeping the phone at the bedside as an alarm Choosing a clock with a bright white or blue display Ignoring status LEDs on chargers, televisions, and alarms Optimizing the room while never addressing circadian timing or pain Setting the room too warm, which delays sleep onset Continuing environmental changes instead of seeking assessment When to See a Professional Equipment supports a plan, and it does not replace assessment. See a concussion-experienced clinician if symptoms persist beyond the expected recovery window, if you have not had a formal exercise tolerance test before starting graded exercise, or if symptoms are worsening rather than improving. Persistent post-concussion symptoms usually reflect treatable vestibular, ocular, cervical, sleep, and mood problems, and identifying which apply changes management substantially (Silverberg et al., 2020). Seek urgent care for worsening headache, repeated vomiting, seizure, increasing confusion or drowsiness, weakness, numbness, or any new neurological sign. Progression Strategy Week one, move the phone out and use a simple clock. Week two, control light with curtains or a mask and eliminate every status LED. Week three, set the room cooler and address noise if it wakes you. Week four, add a router timer if late-night use is a problem. Then stop changing the environment and evaluate. If sleep has not improved after a month of consistent application, book assessment covering circadian timing, pain, sleep apnea, medication, and mood rather than buying more equipment. Does EMF exposure affect sleep? Double-blind provocation studies consistently find people cannot detect whether an electromagnetic field is present better than chance, and symptoms track believed rather than actual exposure. The symptoms people report are real, and the attribution to electromagnetic fields is not supported. Why do people feel better after a low-EMF bedroom setup? Because the protocol removes light, notifications, and device access, all of which genuinely disrupt sleep. Moving the phone out eliminates the brightest light source, the notification sounds, and the option to scroll at 3am. The changes work through those mechanisms rather than electromagnetically. Are shielding canopies and paints worth buying? They are difficult to justify given the provocation study evidence, and they cost far more than the free changes that reliably help. Reinforcing the attribution can also increase symptom focus, and money spent here delays assessment of treatable causes. What is the single most useful change? Moving the phone out of the bedroom and using a basic clock. It costs nothing and removes the brightest light source, notification interruptions, middle-of-the-night scrolling, and clock-watching in one step. What if my sleep does not improve? Seek clinical assessment rather than making further environmental changes. Post-concussion insomnia often reflects circadian disruption, pain, sleep apnea, medication effects, or mood problems, none of which respond to bedroom optimization and all of which respond to specific treatment. References Leddy, J. J., Haider, M. N., Ellis, M. J., et al. (2019). Early subthreshold aerobic exercise for sport-related concussion: a randomized clinical trial. JAMA Pediatrics, 173(4), 319-325. PubMed Leddy, J. J., Haider, M. N., Ellis, M., et al. (2018). Exercise is medicine for concussion. Current Sports Medicine Reports, 17(8), 262-270. PubMed Leddy, J. J., Wilber, C. G., & Willer, B. S. (2018). Active recovery from concussion. Current Opinion in Neurology, 31(6), 681-686. PubMed Mathias, J. L., & Alvaro, P. K. (2012). Prevalence of sleep disturbances, disorders, and problems following traumatic brain injury: a meta-analysis. Sleep Medicine, 13(7), 898-905. PubMed Merezhinskaya, N., Mallia, R. K., Park, D., et al. (2021). Photophobia associated with traumatic brain injury: a systematic review and meta-analysis. Optometry and Vision Science, 98(8), 891-900. PubMed Rubin, G. J., Nieto-Hernandez, R., & Wessely, S. (2010). Idiopathic environmental intolerance attributed to electromagnetic fields: an updated systematic review of provocation studies. Bioelectromagnetics, 31(1), 1-11. PubMed Rubin, G. J., Das Munshi, J., & Wessely, S. (2005). Electromagnetic hypersensitivity: a systematic review of provocation studies. Psychosomatic Medicine, 67(2), 224-232. PubMed Gilgen-Ammann, R., Schweizer, T., & Wyss, T. (2019). RR interval signal quality of a heart rate monitor and an ECG Holter at rest and during exercise. European Journal of Applied Physiology, 119(7), 1525-1532. PubMed Gorny, A. W., Liew, S. J., Tan, C. S., et al. (2017). Fitbit Charge HR wireless heart rate monitor: validation study conducted under free-living conditions. JMIR mHealth and uHealth, 5(10), e157. PubMed Patricios, J. S., Schneider, K. J., Dvorak, J., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695-711. PubMed Silverberg, N. D., Iaccarino, M. A., Panenka, W. J., et al. (2020). Management of concussion and mild traumatic brain injury: a synthesis of practice guidelines. Archives of Physical Medicine and Rehabilitation, 101(2), 382-393. PubMed