Updated 3 October 2026
At a glance
- A 2026 systematic review found fatigue highly prevalent across common mental disorders, with prevalences between 18% and 100%, and suggested fatigue can predict depression and depression can predict fatigue (BMC Psychiatry).
- The term post-exertional malaise comes from ME/CFS research, where it is defined as an abnormal response to minimal amounts of physical or cognitive exertion, with onset that can be immediate or delayed by hours, days or longer (NINDS).
- In interviews with 25 people with bipolar disorder using a self-management app, perceived effort was one of three drivers of engagement (PolarUs study), which is why a crash log works better short.
- Bipolar Journey keeps effort, crash timing, sleep, mood, and recovery on one dated timeline, so a weekly look takes minutes.
Some days with bipolar disorder end in a particular kind of tiredness: a short outing, a hard call, or an afternoon at a screen, followed by a drop that arrives hours later or the next morning and takes a day or two to lift. The effort looked small, and the cost was not. People often ask whether it is depression, sleep, a medicine, or something else, and the answer is easier to find with a record.
This guide shows how to log a crash after minimal effort in four fields, how to note mood and sleep around it, how to keep the log light enough to survive a bad week, and how to read it once a week. It also covers signs that call for contact with your care team. It records patterns only; interpretation and treatment belong with your clinician.
What a crash after small effort can look like with bipolar disorder
A crash after small effort is a drop in energy and function that is out of proportion to what you did and that often arrives later, not during the activity. The effort can be physical, mental, or social: a walk to the shop, an hour of paperwork, a family dinner.
Fatigue is common across mood disorders. A 2026 systematic review of 46 papers found it highly prevalent in common mental disorders, with prevalences between 18% and 100%, and noted that research suggests fatigue can predict the onset of depression and that depression can predict the onset of fatigue (BMC Psychiatry). NIMH lists trouble concentrating, sleeping too much or too little, and being unable to do even simple things among the symptoms of a depressive episode.
A log cannot say which of these is behind a given crash. It can show how often crashes happen, what came before, and how long recovery took, which is what a clinician needs.
Bipolar Journey (by Health Journey Labs) begins the day's record with a Daily check-in covering physical symptoms, mood, sleep, and exercise, which gives a crash a same-day baseline. The Flare Tracker flags a crash that stands out against your usual hard week. Over a few weeks, the history shows a pattern in how often these drops arrive.
Crash, fatigue or post-exertional malaise with bipolar disorder: which word to use
The term post-exertional malaise (PEM) comes from research on ME/CFS. The NINDS common data elements project defines it as an abnormal response to minimal amounts of physical or cognitive exertion, with symptoms that can include fatigue, problems thinking, and unrefreshing sleep, a loss of stamina or functional capacity, an onset that can be immediate or delayed by hours, days or even longer, and a prolonged, unpredictable recovery (NINDS).
Whether the same pattern applies to bipolar disorder is a question for your clinician, and a log cannot settle it. The useful part for you is the shape: small effort, delayed drop, slow recovery. That is why the phrase "PEM-like" appears here as a description of a pattern worth recording, and "crash" is the word to use in your own notes.
Plain words for a crash entry
Bipolar Journey uses "crash" for the event and plain terms for the rest.
- Use "crash" for the event in your log, and describe it in plain terms
- Write "delayed" when the drop came more than a few hours after the effort
- Avoid labeling the cause on the day, since the cause is usually unclear at the time
- Bring the word PEM to your clinician only as a question, such as "does this pattern fit anything you see?"
With Bipolar Journey, the Daily Journal holds your own wording for the crash, typed or spoken, so you do not need a clinical term. Learn offers short reads on sleep, mood, and routines to look at beside your entries. Across weeks, the pattern in your notes shows whether the same kind of effort keeps leading to the same kind of drop.
A four-field bipolar crash entry: effort, delay, drop and recovery
Four fields are enough to turn a bad day into data. Write them in one line each, ideally on the day of the crash or the morning after.
Effort, delay, drop and recovery
Bipolar Journey records a crash in four fields.
| Field | What to write | Example |
|---|---|---|
| Effort | What you did, how long, and whether it was physical, mental, or social | Two-hour video call, then a short walk |
| Delay | How long after the effort the drop began | About 6 hours |
| Drop | What changed, with a 0 to 10 energy rating | Energy 7 to 2, legs heavy, thoughts slow |
| Recovery | How long until you were back to your usual | Two days |
Count mental and social effort in the first field, since they are easy to leave out. The NIMH list of manic symptoms includes feeling able to do many things at once without getting tired, so during an elevated stretch it helps to write down what you did even if it felt effortless. A crash afterward is easier to understand when the effort is on paper.
From Bipolar Journey, we recommend writing the effort first and the crash second, because that order keeps the entry factual.
In Bipolar Journey, the Daily check-in takes the energy rating and the mood and sleep context for the same date. The Daily Journal holds the effort, delay, and recovery lines. After a month, the pattern shows which efforts lead to crashes and how long the delay usually runs.
Mood and sleep around a bipolar crash: recording the state, not a verdict
With bipolar disorder, mood and sleep are part of the context of any energy drop, so two extra lines are worth adding. They describe the state, and they do not reach a conclusion.
Mood and sleep around a crash
Bipolar Journey looks at the 48 hours before each crash.
- Mood in the 48 hours before: low, steady, elevated, irritable, or mixed, with a short note
- Sleep the night before and the night after: hours, wake-ups, and a rested rating
- Whether you were running faster than usual on the day of the effort
NIMH describes manic episodes as including a decreased need for sleep, and depressive episodes as including disrupted sleep in either direction, from trouble falling asleep to sleeping too much. Writing the hours, and not a guess about which episode type applies, keeps the record usable by someone who can interpret it. Our guide on how short sleep affects mood the next day goes into the sleep side in more detail.
Medicines taken on the day belong in the record as names and times only. Questions about whether a medicine plays any part go to your prescriber.
Bipolar Journey keeps sleep, mood, and energy in a single Daily check-in, so the nights around a crash sit on the same timeline. My Meds logs each medicine's name, time, and dose against the same dates. The history can show whether crashes follow short nights, long nights, or neither.
Keeping a crash log light with bipolar disorder: time limits, fixed check-ins, and a short version
A crash log can become another thing to watch yourself for. Three limits help. First, a time limit: two minutes per entry, and a stop after the four fields. Second, fixed check-ins: write once in the evening and once in the morning, and skip the rest of the day. Third, a short version for bad days: the date, an energy number, and one word.
The evidence on self-monitoring points the same direction. In a qualitative study of 25 people with bipolar disorder using a self-management app, perceived effort was one of the drivers of engagement, alongside motivation and salience, and mood symptoms shaped how people used the app in daily life (PolarUs study). A log that asks for little is more likely to be kept going when it matters.
Full and short log versions
Bipolar Journey offers a short version for heavy weeks.
| Version | When | What |
|---|---|---|
| Full | Steadier days | Four fields plus mood and sleep lines |
| Short | Crash days | Effort, energy number, recovery guess |
| Thin | Worst days | Date, energy number, one word |
If checking starts to feel compulsive or distressing, tell your care team; a lighter schedule is a legitimate change.
In Bipolar Journey, Weekly Goals can carry a single limit for the week, for instance "two entries a day, no more", with a mark for whether it held. The Daily check-in takes seconds on a thin day. A few weeks of that habit show which version of the log you can keep.
Telling a crash from a low stretch of bipolar disorder: questions to write down for a clinician
Crashes and low stretches can overlap, and only a clinician can sort them out. Your job is to capture what you can observe, with dates, so that the clinician has something to compare. The table lists four questions and what to write for each.
A crash or a low stretch?
Bipolar Journey lists questions that help a clinician tell them apart.
| Question | What to write |
|---|---|
| What came first? | The effort or event before the drop, or "nothing I can name" |
| How long did it last? | Start date and end date, or "still ongoing" |
| What happened to interest? | Whether interest in usual activities changed, and when it returned |
| What happened to sleep? | Hours and wake-ups for the nights around it |
The table gives logging prompts only, never diagnostic tests, and "unclear" is a legitimate entry. If low mood, loss of interest, or changes in sleep continue for most of a week, write that down and contact your care team.
Bipolar Journey includes My Assessments, which asks longer structured questions past the daily scores and keeps the life context from onboarding. The Daily Journal holds the "unclear" lines in your words. Together they give the history enough range to show a pattern your clinician can interpret.
A ten-minute weekly look at a crash log for bipolar disorder: counts, repeats, and one question
Once a week, on a steadier day, spend ten minutes on the entries. Stay with counts and avoid reading each day as a verdict.
A ten-minute weekly crash review
Bipolar Journey counts crashes and the efforts before them.
- Count the crashes this week and the efforts that preceded them.
- Note the usual delay and the usual recovery time, as a range.
- Check whether the same kind of effort repeats: calls, shopping, a social evening, a long drive.
- Look at mood and sleep for the two days around each crash.
- Pick one question for the next week, such as "does a rest break after a call change the evening?"
Treat the question as a record-keeping experiment and not a rule to follow. Changing several things at once, such as work hours, sleep timing, and exercise, will blur the result. Any change in medicines or sleep schedule needs your clinician, and the log is the evidence you bring them.
With Bipolar Journey, the Flare Tracker dates each crash so the weekly count is quick. Weekly Goals can hold the one question for the week. After a month, the pattern separates one-off drops from the repeating ones.
Crash signs with bipolar disorder that need prompt care rather than a log entry
A crash log is for the ordinary hard days. Some signs call for contact with your care team, or for emergency help, before any entry. NIMH includes hopelessness, worthlessness, and thoughts of death or suicide in its symptom list for a depressive episode, and also difficulty keeping up with work, social activities, or relationships. If you are thinking about harming yourself or feel unsafe, reach your local emergency number or a crisis line immediately; in the United States, NIMH points to calling or texting 988.
Contact your care team promptly for:
Signs that need prompt care
Bipolar Journey lists signs that should not wait for a log review.
- A crash that does not lift, or low mood and lost interest that continue for most of a week
- A sharp change in sleep, such as days of very little sleep with high energy
- Chest pain, fainting, new weakness, or any symptom that feels like a physical emergency
- Anything that frightens you or that someone close to you notices before you do
Write down what you know when you call: the dates, the sleep hours, and what changed. The log makes that call shorter.
In Bipolar Journey, the Daily Journal keeps a quick description of whatever frightened you, with its date. The Flare Tracker marks the day so the timeline is clear when you call. The history across days shows how this stretch compares with your usual pattern.
Bringing the crash log to a bipolar disorder doctor visit
Clinicians often ask about mood words, and the crash log adds function: what effort, how long until the drop, and how long to recover. Before the visit, pick the last four weeks and prepare a few lines: number of crashes, the usual effort and delay, the range of recovery, and the mood and sleep around them. If a lab result is part of the picture, our guide on tracking bipolar labs beside mood and sleep weeks shows how to keep results beside the log, and explaining a hard week to a partner can help the people around you understand the pattern.
Questions about crash patterns
Bipolar Journey asks what the pattern suggests and what to watch next.
- Does this pattern fit anything you see in other patients, and what would you want to check?
- Could sleep, mood stage, or another condition explain the crashes?
- Should any tests be considered, and when?
- What should I do on a crash day, and when should I call?
Write the answers on the log itself, and ask which part of the pattern your clinician wants to watch.
In Bipolar Journey, My Care Team collects your clinicians and what each visit covered, which keeps your questions and the replies in one spot. The Doctor Report pulls the logged dates, sleep, mood, and function onto one printable page. My Labs stores when each test was done, so you can show whether a result landed in a run of crashes.
How Bipolar Journey can help
A notebook can hold four fields. It gets harder to compare once crashes, mood, sleep, and recovery pile up across weeks. A tracker that stores them together keeps each entry short and does the lining up. Compare options in Best Bipolar Apps 2026.
Bipolar Journey is a personal bipolar disorder tracker from Health Journey Labs on the App Store and Google Play. It lets you log a crash in seconds, with effort, delay, energy, mood, and sleep in one place. After a few weeks, the entries show which efforts repeat before a crash and how long recovery takes, and they give you a concrete summary for your next visit. Below is what you can use and how each part helps.
- Daily check-in — A short guided entry on how your body, mood, food, sleep, exercise, and meds went, plus outside factors.
- Daily Journal — Written or spoken notes for what a score leaves out, such as what a short night cost, a partner's question, or a visit debrief.
- Flare Tracker — Mark the day that clearly beat your usual hard week, like a mood spike, a wired stretch on little sleep, or a crash that stands out.
- My Meds — A list of medicines you already take as prescribed, with timing and dose, shown against sleep hours and next-day mood.
- My Assessments — Longer structured check-ins past the daily scores, along with the life and social context from onboarding.
- Learn — Brief topics on sleep, mood, routines, and visit prep that you can read against your own entries.
- AI companions — Clara for general conversation and specialist companions for knowledge, fitness, nutrition, and relationships; each sees your logged history, so they can help word a visit question, a calm script, or a rain-check line.
- Weekly Goals — A single small aim for the week, with a mark for whether it held.
- Doctor Report — A one-page export of the history you logged: dates, sleep and mood context, and how you functioned.
- My Care Team — Your clinicians with short visit notes, for planning what to ask and bring, jotting in the room, and reviewing after.
- My Labs — Result dates for blood counts, levels, and other tests, read with sleep, mood, and function.
- Period Tracker — Start and stop dates, flow, and how heavy or light the bleeding felt, read with sleep, mood, energy, and the rest of what you log.
- Food Tracker — Meal or drink lines, including caffeine and alcohol, read with sleep and mood.
- Weight Tracker — Scale readings or body notes, kept on their own.
Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.
We make Bipolar Journey at Health Journey Labs. This guide is educational and does not replace medical advice. Diagnosis, medication decisions, and urgent care decisions belong with your treating clinicians.
Sources
- Systematic review of the prevalence of fatigue in common mental disorders. BMC Psychiatry. 2026
- NINDS Common Data Elements — ME/CFS Post-Exertional Malaise Subgroup summary
- What influences engagement with a bipolar disorder self-management app? A qualitative investigation of use of the PolarUs app. PLOS Digit Health. 2025
- NIMH — Bipolar Disorder (publication)
- NIMH — Bipolar Disorder (health topic page)
FAQ
The answers below draw on the sources cited in this guide, and the app they mention is Bipolar Journey (by Health Journey Labs).
What is a crash after minimal effort with bipolar disorder?
It is a drop in energy and function that is out of proportion to what you did, often arriving hours later and lasting a day or more. The effort can be physical, mental, or social, and the cause is usually unclear at the time.
In Bipolar Journey, the Flare Tracker marks the crash and the Daily Journal holds the effort and recovery lines. Across weeks, the history shows how often these drops come and what tends to precede them.
Is this the same as post-exertional malaise?
The term comes from ME/CFS research, where it describes an abnormal response to minimal exertion with delayed onset and slow recovery. Whether bipolar disorder shares it is a question for your clinician, so the log uses the plain word crash and describes the shape of the event.
With Bipolar Journey, your own words in the Daily Journal are enough, and no clinical label is needed. The pattern across weeks gives your clinician the shape of the event to interpret.
What are the four fields, and can I do fewer?
Effort, delay, drop, and recovery. On a bad day, write the date, an energy number, and one word, and fill in the rest later if you can. A thin entry that exists is more useful than a full one that never gets written, so lower the bar on the hardest days.
In Bipolar Journey, a Daily check-in is brief, and the Daily Journal can take a spoken note. Later, you can see how many days stayed thin and what the fuller days looked like.
Does mental or social effort count as effort?
Yes. A long call, a hard conversation, or an evening with people can be followed by a crash as readily as a walk. Writing these down is how you find out whether they matter for you, and your clinician can read them as effort too.
With Bipolar Journey, the Daily Journal holds the effort line in your words. The pattern across weeks shows which kinds of effort lead to the biggest drops and which hardly register.
What if I feel fine during the effort and crash afterward?
Write what you did anyway, with the time. During elevated stretches, effort can feel effortless, and a crash afterward is easier to understand when the effort is on paper. Mention sleep and any changes in energy that week to your clinician, since they may want to look at the whole stretch.
In Bipolar Journey, the Daily check-in records sleep and energy beside the Daily Journal effort line. Over time, the history shows whether crashes tend to follow your faster days or arrive at random.
How do I log sleep around a crash?
Write the hours, the wake-ups, and a rested rating for the night before and the night after. Avoid guessing what the sleep means. A clinician can read hours and ratings, while a guess about meaning makes the record harder to use later.
In Bipolar Journey, the Daily check-in carries sleep along with mood and energy. The pattern across weeks can show whether crashes follow short nights, long nights, or neither of them.
Should I log medicines in a crash entry?
Log the names and times of what you took, as prescribed. Do not change anything based on a crash log. Questions about whether a medicine plays a part go to your prescriber, who can use the dates you bring.
In Bipolar Journey, My Meds holds the medicine names with their times and doses. The history then shows how doses line up with sleep, mood, and the crash days you logged.
How do I avoid watching myself all day?
Set limits: two minutes per entry, two fixed check-ins a day, and a short version on bad days. If the log starts to feel compulsive or distressing, tell your care team and lighten the schedule.
With Bipolar Journey, Weekly Goals can hold the limit as a small aim and show whether it held. The history helps you see which version of the log you can keep.
How do I tell a crash from depression?
You may not be able to, and a clinician is the person to ask. Record what came first, how long it lasted, whether interest returned with energy, and how sleep changed, then bring the dates.
In Bipolar Journey, the Daily Journal holds the unclear days in your words, and the Daily check-in keeps sleep and mood. The pattern across weeks gives your clinician something concrete.
What should I do in the weekly look?
Count the crashes, note the usual delay and recovery range, check what effort repeats, and pick one question. Stay with counts, and avoid reading each day as a verdict about you or your progress.
With Bipolar Journey, the Flare Tracker dates each crash so the count is quick. The pattern over a month separates one-off drops from the repeating ones worth raising with your care team.
Which signs mean I should stop logging and call someone?
Hopeless thoughts, thoughts of death or suicide, feeling unsafe, low mood and lost interest lasting most of a week, a sharp change in sleep, or a physical emergency. Call your local emergency number or crisis line for immediate danger, and tell someone nearby if you can.
In Bipolar Journey, the Daily Journal and Flare Tracker give you dates and details for the call. The history shows how this stretch compares with your usual pattern, which helps whoever you speak to.
How do I show a crash log at a visit?
Prepare a few lines from the last four weeks: the number of crashes, the usual effort and delay, the recovery range, and mood and sleep around them. Start with the counts and follow with your question.
With Bipolar Journey, the Doctor Report gathers the dated entries onto a page for the appointment, and My Care Team keeps the questions you want answered. You can record the replies afterward.
How can I explain a crash to people close to me?
Use the shape, not the cause: a small effort, a delayed drop, and a recovery time. Showing a few dated entries is often easier than describing the feeling, and it keeps the conversation on facts that anyone can follow.
The AI companions in Bipolar Journey can draft a calm explanation from your logged history. The Daily Journal keeps the examples you decide to share, and nothing leaves your account unless you choose.
How can I protect my privacy in what I write about my health?
Mood entries, sleep hours and notes from a hard week can be read out of context by someone who was not there. Keep the log behind a passcode, avoid shared devices, and agree with your clinician or a trusted person on what you share and when.
Entries you add to Bipolar Journey are your own health notes. Check the app's privacy policy for how data is stored and handled. Nothing in this article is medical advice.