Physics Girl
Post-exertional malaise turns routine exertion and emotional stress into debilitating crashes, threatening to erase hard-won gains for millions suffering from severe Long COVID and ME/CFS.
AI-assisted summary of First Update From Dianna (Physics Girl) — original source. Check the original for full context.
Source published:
Key ideas
- After nearly two years bedbound due to severe Long COVID and ME/CFS, Dianna Cowern demonstrated remarkable progress, including walking unassisted and completing her first brief solo outdoor walk in two and a half years. (10:07)
- Recovery remains exceptionally fragile; an emotional trauma triggered a February crash that wiped out three months of physical and cognitive progress in just days. (3:34)
- The video highlights the extreme severity of end-stage ME/CFS through Dianna's friend Tobias in Germany, who became bedbound in 2021, dropped to 100 pounds at 6'2", and was approved for Medical Assistance in Dying (MAID). (4:51)
- Public health estimates indicate that post-infectious neuroimmune illnesses have reached critical scale, with roughly 3 million Americans diagnosed with ME/CFS and over 30 million affected by Long COVID. (7:11)
Detailed notes
## Background Published on YouTube by Dianna Cowern on the Physics Girl channel on May 22, 2025, this video offers an intimate update on her prolonged battle with severe chronic post-viral illness. The video description directs viewers to support Dianna's recovery through Patreon, contribute to a GoFundMe for her friend Tobias, and explore educational resources on Long COVID and ME/CFS through the Open Medicine Foundation.
## TL;DR After nearly two years completely bedbound with severe Long COVID, ME/CFS, and MCAS, science communicator Dianna Cowern and her husband Kyle document her fragile journey toward functional improvement. They explain the debilitating mechanics of post-exertional malaise (PEM) and immune flare-ups, contrasting hard-won gains like embroidering and standing with sudden, devastating setbacks. Dianna highlights the harrowing reality of end-stage ME/CFS through the story of her German friend Tobias, whose approval for Medical Assistance in Dying (MAID) underscores the devastating suffering and medical abandonment faced by patients. Concluding with cautious optimism, Dianna celebrates small but profound signs of progress, including taking her first independent outdoor walk in two and a half years and regaining the neurological capacity to process the world outside her window.
## Atmosphere & style The video carries an intensely vulnerable, heartbreaking, and quietly resilient tone, captured through candid domestic footage and deeply personal reflections between Dianna and Kyle. Watching it feels like witnessing an agonizingly fragile balancing act, where profound trauma, hypervigilance, and the ever-present threat of physical collapse exist alongside enduring marital devotion. While the discussion of Tobias's suffering casts a heavy, devastating shadow over the piece, the emotional arc ultimately breathes with tender relief as Dianna finds spontaneous joy in quiet milestones and the simple sight of birds outside her room.
## Bulletin - [10:07](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=607s) After nearly two years bedbound due to severe Long COVID and ME/CFS, Dianna Cowern demonstrated remarkable progress, including walking unassisted and completing her first brief solo outdoor walk in two and a half years. - [03:34](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=214s) Recovery remains exceptionally fragile; an emotional trauma triggered a February crash that wiped out three months of physical and cognitive progress in just days. - [04:51](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=291s) The video highlights the extreme severity of end-stage ME/CFS through Dianna's friend Tobias in Germany, who became bedbound in 2021, dropped to 100 pounds at 6'2", and was approved for Medical Assistance in Dying (MAID). - [07:11](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=431s) Public health estimates indicate that post-infectious neuroimmune illnesses have reached critical scale, with roughly 3 million Americans diagnosed with ME/CFS and over 30 million affected by Long COVID.
## Key takeaways - [00:00](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=0s) Dianna developed severe Long COVID following a COVID-19 infection, which rapidly progressed over nine months into emergency room visits and profound disability. - [00:00](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=0s) ME/CFS is distinguished from broader Long COVID by post-exertional malaise (PEM), where minor physical, cognitive, or emotional effort causes severe, disproportionate crashes. - [01:49](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=109s) For nearly two years, Dianna was entirely bedbound and unable to tolerate basic cognitive stimulation such as reading, audiobooks, or screen entertainment. - [01:49](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=109s) Co-occurring Mast Cell Activation Syndrome (MCAS) severely complicates treatment by triggering hyperinflammatory immune responses to foods and medications. - [01:49](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=109s) The margin for exertion in ME/CFS can be razor-thin; even 30 seconds of gentle foot-pushing exercises previously caused Dianna a week-long crash. - [03:34](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=214s) Gradual improvements allowed Dianna to embroider, watch complex mystery series, and walk across the room unassisted before experiencing a major setback. - [03:34](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=214s) Crashes in ME/CFS are unpredictable, and there is never a medical guarantee that lost physical or cognitive capacity will return after a relapse. - [04:51](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=291s) Emotional exertion carries the same biological penalty as physical effort; learning that her friend Tobias was approved for MAID directly triggered a multi-week crash. - [07:11](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=431s) End-stage ME/CFS can strip away all sensory and physical tolerance, leaving patients unable to roll over, bear clothing friction, or see human faces without crashing. - [07:11](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=431s) Tobias's decline illustrates severe medical trauma in ME/CFS care, including inappropriate physical forcing by hospital staff that worsened his state to severe wasting and PICC-line feeding. - [10:07](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=607s) Dianna achieved a major milestone by taking a spontaneous five-minute solo walk outside, her first alone in two and a half years. - [11:12](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=672s) Evaluating PEM requires looking at delayed symptoms rather than immediate feelings, complicating everyday pacing choices. - [11:12](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=672s) A crucial neurological sign of improvement is Dianna's restored ability to visually process the outdoor environment through her window, relieving profound cognitive isolation.
## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=0s) The Reality of Severe Long COVID and ME/CFS
The video opens with a stark plea regarding the severity of chronic post-viral illness: “I want people to know about this disease. I want them to know how bad it can get.” Retrospective clips and discussions outline the devastating onset of Dianna Cowern's illness. After contracting COVID-19, she developed Long COVID, losing functional capacity month after month. Within nine months, her health spiraled to the point where she was rushed to the emergency room twice in a single week. Her husband, Kyle Kitzmiller, recalls the heart-wrenching emotional toll of those early stages, noting that Dianna would call him into the room in tears, grieving the loss of their future: “I wanted to have a life with you. I wanted to have a family with you. I wanted to have kids. It's the thing I want most in the world, and I'm not going to be able to do that, and I don't know if we're going to be able to.”
The narrative distinguishes general Long COVID from Myalgic Encephalomyelitis / Chronic Fatigue Syndrome (ME/CFS). While Long COVID encompasses a broad cluster of symptoms—including severe fatigue, brain fog, and Postural Orthostatic Tachycardia Syndrome (POTS)—ME/CFS is defined by post-exertional malaise (PEM). Under PEM, even trivial amounts of physical, cognitive, or emotional exertion lead to disproportionate, catastrophic physiological crashes. Reflecting on the sudden loss of Dianna's career and channel, Kyle remarks: “I just feel like a second ago we were laughing hard on the couch planning to make a video and now Physics Girl is going to be shut down for years with how we're talking about it.”
[01:49](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=109s) Two Years Bedbound, MCAS, and the Fragility of Recovery
After more than two years of illness—nearly two full years of which were spent completely bedbound—Dianna’s quality of life remained unimaginably restricted. Basic daily care tasks like showering or cleaning herself were impossible. Cognitive stimulation had to be entirely eliminated; she could not read, listen to audiobooks, or watch movies. Only recently did minor improvements begin: after going over a year and a half without being able to watch any screen entertainment, they finished three movies over a two-month span, pacing the viewing in tiny increments that grew from 5 minutes to 15 minutes at a time. Even conversational intimacy remains heavily constrained, as Dianna cannot engage in deep, animated, or emotionally charged discussions without risking a flare-up.
```mermaid flowchart TD accTitle: Pathological Interlocking of ME/CFS and MCAS accDescr: Diagram illustrating how attempts to exert or treat symptoms trigger post-exertional malaise crashes and mast cell flare-ups. subgraph MultiSystem["Complex Chronic Illness Layering"] A["Long COVID Base"] --> B["ME/CFS (Post-Exertional Malaise)"] A --> C["Severe MCAS (Hyperinflammatory Reactivity)"] end subgraph TriggerCycle["Compounding Triggers"] D["Physical or Emotional Exertion"] -->|"Exceeds Tiny Energy Envelope"| B E["Medical Treatments or Ingestion"] -->|"Immune Hyper-Response"| C B --> F["Severe Multi-Day to Multi-Month Crash"] C --> F end ```
Treating Dianna's condition is further complicated by severe Mast Cell Activation Syndrome (MCAS), an extreme hyperinflammatory immune reaction that attacks her body in response to virtually any new food, medication, or external substance entering her system. This creates a vicious cycle where treatments aimed at managing one symptom trigger an aggressive immune response from another. The razor-thin margin for physical activity is highlighted by a routine leg exercise: while feeling slightly better, Dianna gently pushed her feet against the floor for a cumulative total of roughly 30 seconds, only to suffer a severe, week-long crash. Kyle observes that her greatest overarching fear throughout this prolonged ordeal has been the terror that she might never recover.
[03:34](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=214s) Glimmers of Improvement and the February Crash
During a period of notable improvement, Dianna is shown sitting up, smiling, and sharing her accomplishments with a visitor. She displays finished embroidery hoops and works-in-progress, explaining that she has progressed to watching complex, mystery-driven television series such as *Severance* that demand real cognitive focus. Most remarkably, she demonstrates standing and walking across the room completely unassisted, eliciting astonishment from those around her.
However, this upward trajectory was violently interrupted in February when Dianna suffered an intense crash. Over just a few days, roughly three months of hard-won physical and cognitive gains vanished. She lost her ability to watch television or embroider, and her outlook plummeted into deep depression. While her baseline functions eventually began returning as the crash receded, Kyle emphasizes the chilling unpredictability of the illness: there is never any guarantee that lost abilities will return after a severe crash.
[04:51](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=291s) The Story of Tobias and Medical Assistance in Dying
Dianna attributes her severe February crash directly to emotional trauma surrounding Tobias, a close friend living in Germany whom she met through the ME/CFS community. Dianna notes that sharing the exact same lived experience formed an immediate, profound bond between them that healthy people cannot fully understand. Tobias’s illness had deteriorated to such an agonizing extreme that he applied for and was approved for MAID (Medical Assistance in Dying). Dianna reflects on the crushing emotional toll this news took on her: “He got approved for MAID. Have you heard of that? Medical assistance in death. And that just has been tearing me apart. That's probably why I crashed. Just the emotional aspect of it.” Connecting with Tobias also reopened painful memories of who she was before falling ill, thoughts she had suppressed because they caused too much grief.
Tobias’s partner paints a picture of his vibrant life before chronic illness took hold. He was brilliant, funny, hardworking, and an avid lover of music, travel, and long three-hour hikes in the woods with his dog, Molly. His decline spanned 15 years: - **2010**: Tobias first fell ill, operating at roughly 90% capability while symptoms gradually eroded his strength. - **Intervening Years**: He was forced to give up his passions, including gym workouts and outdoor hiking. - **December 2021**: He became fully bedbound, unable to stand up from bed one morning. - **Progression of Sickness**: Early optimism and positivity were slowly extinguished as the illness intensified.
[07:11](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=431s) The Brutality of End-Stage ME/CFS
Communicating solely via sporadic text messages—an effort so taxing that Tobias must premedicate simply to type—he asked Dianna to share the stark, horrifying reality of end-stage ME/CFS with the world. Dianna relays his words directly: “You can't even call this quality of life. It's just constant waiting, just hoping for the day to end so you can take your sleeping pills and escape the situation as fast as possible.”
Dianna points out that while she experienced similar levels of absolute helplessness for three months, Tobias has lived through that level of severity for four uninterrupted years, compounded by immense physical pain: - **Mobility and Care**: He cannot roll over in bed, change his own clothes, or tolerate the sensory friction of wearing clothing, leaving him staring at the ceiling all day. - **Sensory and Physical Intolerance**: The visual stimulation of seeing a human face is overwhelming. He suffers severe PEM crashes from the physical exertion of laughing or crying, forcing him into complete emotional suppression. - **Physical Deterioration and Medical Trauma**: Tobias spent over a year institutionalized in a hospital where staff repeatedly forced him to attempt standing. Standing at 6'2", his weight dropped to just 100 pounds, requiring total parenteral nutrition through a PICC line. - **Internal Sensations**: He endures a relentless, heavy burning sensation deep inside his muscles alongside profound cellular exhaustion.
Tobias’s partner notes that during the darkest three years of their lives, they lost complete faith in medicine, doctors, and society due to the total absence of institutional help. An expert voice emphasizes the colossal public health scale: Long COVID has unleashed a "tsunami" of post-infectious fatiguing neuroimmune conditions, with an estimated 3 million individuals diagnosed with ME/CFS in the United States and projections reaching over 30 million suffering from Long COVID.
[10:07](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=607s) A Fragile Step Toward Independence
After spending roughly a month incapacitated by her crash, Dianna’s baseline slowly began to rebound. She regained her ability to walk and surprised Kyle by quietly walking out the front door entirely on her own for a five-minute outdoor walk—her first solo walk in two and a half years. Kyle describes the startling experience of having to run after her down the street, admitting that after two years of complete bedbound dependence, seeing her upright around the house still catches him off guard. Dianna reflects humorously on sneaking out for the walk, while keeping the physical exertion slow, brief, and heavily managed to protect herself from triggering another severe setback.
[11:12](https://www.youtube.com/watch?v=vqeIeIcDHD0&t=672s) Navigating PEM and Reconnecting with the Outside World
Dianna reflects on the subtle indicators of progress in her illness, explaining that not experiencing post-exertional malaise (PEM) the following day is a major milestone. As she puts it, “I don't feel the PEM the next day, which is the bigger deal cuz I'm less worried about how I feel in the moment and how it's going to affect me the next day, which is why this disease is so challenging to navigate.” The delayed consequence of activity makes day-to-day decisions uniquely difficult, especially when contrasted with her previous life. Dianna shares how painful it has been to witness people outside simply walking or running, noting that prior to getting sick, all of her favorite pastimes aside from making videos were highly physical pursuits like surfing, snowboarding, hiking, and running. Losing the ability to engage in those active hobbies previously left her feeling deeply depressed.
Even without being physically able to engage in sports, Dianna finds meaningful relief in being able to cognitively experience her surroundings again. For months, even during periods when her sensory tolerance allowed her to turn her gaze toward the window, her brain simply could not process what she was seeing, describing the sensation as frustrating, weird, and hard. Now, that mental barrier has lifted enough for her to feel reconnected to reality: “Like it feels like I'm much more connected to the outside world just being able to like process what I'm seeing outside the window which I couldn't do for months even when I could handle looking out the window.” Her reflection ends on a spontaneous note of simple joy as she spots wildlife through the glass, laughing, “Birds. Sorry. There's a lot of birds that fly by here and it's so great.”
- **The nature of PEM:** The delayed onset of post-exertional malaise is often more concerning than how an activity feels while doing it, complicating every pacing choice. - **Lost passions:** Outside of creating educational science videos, Dianna's life centered around high-energy outdoor activities including surfing, snowboarding, hiking, and running. - **Cognitive recovery:** A subtle but critical improvement has been the restored neurological capacity to process visual stimuli outside her bedroom window, breaking the severe feeling of isolation.
## Mentioned Dianna Cowern, Kyle Kitzmiller, Tobias, Molly, Kaelyn Lynch, Levi Butner, Physics Girl, Severance, APM Music
## Video description Support Dianna's Recovery → https://www.patreon.com/physicsgirl Support Tobias → https://www.gofundme.com/f/help-save-tobias-his-last-hope-to-live
More about Long COVID: https://www.omf.ngo/what-is-long-covid/ More about ME/CFS: https://www.omf.ngo/resource-center/
Documentary footage by Kaelyn Lynch
Music provided by APM https://www.apmmusic.com/
http://physicsgirl.org/ http://twitter.com/thephysicsgirl http://facebook.com/thephysicsgirl http://instagram.com/thephysicsgirl
Creator: Dianna Cowern Editor: Levi Butner & Dianna Cowern Producer: Kyle Kitzmiller
[Source](https://www.youtube.com/watch?v=vqeIeIcDHD0)