If you live with ME/CFS or Long COVID, you already know the cruel math: do a little too much today, and you pay for it for days. Pacing is how you stay inside your limits — and tracking is how you find where those limits actually are.
Your "energy envelope" is a simple idea for a hard reality: on any given day, you have a finite amount of energy available before your body starts to suffer for it. For most people, energy is flexible — you can borrow against tomorrow and recover with a good night's sleep. For people with ME/CFS and Long COVID, that's not how it works. Push past the edge of your envelope and the cost doesn't get paid back overnight. It comes due as a crash.
Pacing means working within that envelope on purpose — spreading activity out, resting before you're forced to, and treating your energy like a budget you can't overdraw without consequences. It's not laziness and it's not giving up. It's the most evidence-based way many people with these conditions have found to avoid making themselves worse.
The reason this matters so much comes down to one feature of these illnesses: post-exertional malaise, or PEM. PEM is a delayed, disproportionate worsening of symptoms after exertion — and the exertion doesn't have to be exercise. A shower, a phone call, a stressful conversation, or a trip to the shop can all count. This is why the usual advice to "just push through it" or "exercise more" is not only unhelpful here — it can be actively harmful. Pushing through doesn't build tolerance the way it might for a healthy body. It triggers a crash and, over time, can erode the baseline you're working so hard to hold onto.
The hardest part of PEM is the delay. The crash often doesn't arrive until 24 to 72 hours after you overdid it. By then, the cause and the effect feel completely disconnected — you feel awful on Thursday and have no idea it was Monday's activity that did it. That delay is exactly why crashes feel so random and so unfair, and it's exactly the thing that careful tracking can help you see.
None of this is about diagnosing yourself or setting a target activity level from a web page. ME/CFS and Long COVID are real, physical conditions, and the right pacing approach is deeply individual. What tracking gives you is something concrete to observe and bring to your care team: your own patterns, in your own words and numbers, instead of a foggy guess about how the last month went.
Note what you did and roughly how demanding it was — physical, cognitive, emotional, and social all count. A quiet day and a "good day where I finally caught up on everything" look very different here.
Rate how much you have in the tank on a 0–10 scale. This is your read on where your envelope sits today, before you've spent it — a useful anchor for everything else.
Mark the days you crash. Flagging them clearly is what later lets you look backward and ask: what happened in the days before this?
Track the symptoms that matter most to you — fatigue, pain, brain fog, unrefreshing sleep. Severity shifts are often the earliest sign you're nearing the edge of your envelope.
Log how restorative your sleep felt and how much real rest you got. Poor or unrefreshing sleep often both follows overexertion and makes the next day's envelope smaller.
Pay attention to the gap between doing too much and feeling it. Once you can see that 24–72h delay in your own data, crashes start to feel less random and more predictable.
Spend about 45 seconds noting what you did and rating your energy on a 0–10 scale. Daily consistency is what makes the delayed pattern visible later — a single great day or terrible day tells you very little on its own.
On crash days, typing is the last thing you have energy for. Tap the microphone and say a sentence or two about how you feel. Voice logging exists for exactly these days — so the worst days don't become gaps in your record.
When a crash hits, flag it. You don't have to explain it in the moment — just mark it. That single tap is what lets you trace backward to whatever exertion preceded it.
Each week, open the Trends view and look at your activity and energy lines against your crash days. Watch for the lag: did the busy stretch on the left line up with the crash a couple of days later? That delay is the heart of pacing.
Type something like "What happened in the days before my worst crashes?" into the Ask tab. It gives you a plain-language summary of your own patterns — useful for protecting your baseline, and for talking it through with your care team.
Your energy envelope is the amount of energy you have available on a given day without triggering a crash. In conditions like ME/CFS and Long COVID, that budget is real and limited, and going over it has a delayed cost. Pacing means learning where your envelope sits and trying to stay inside it. Tracking helps you find those edges instead of guessing.
Because these conditions involve post-exertional malaise — overdoing it doesn't build tolerance, it triggers a crash, often 24 to 72 hours later. Standard "exercise more" advice can make you worse and erode your baseline over time. Pacing flips the goal from pushing harder to staying steady. This is information to observe and discuss with your care team, not a treatment plan.
On its own, a crash feels random because the cause may be days behind it. When you log activity and energy daily and mark your crash days, the Trends view lets you look back and see what came before. Over a few weeks the delay between overdoing it and crashing becomes visible — which is the first step to staying inside your envelope.
No. The Good Tracker doesn't diagnose, prescribe an activity level, or suggest treatment. It helps you observe your own patterns and limits so you can keep a record and talk them through with your care team. Pattern-tracking complements medical care — it doesn't replace it.
Free to use. Voice-first. Built for the days when doing less is the whole point.
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