Sustained effort
A repeated action over about a minute; the task records how performance changes from start to end as a neutral measurement to keep and share, never a score or a result.
Experimental check-in task — not a cleared or approved medical device. This task records neutral measurements for you to keep and share. It does not score you, does not say what any number means, and does not diagnose. Only a clinician can interpret it.
What this task looks at
This task looks at how a repeated action changes over time — you keep up a simple action (like sustained tapping) for a while, and it records performance in each stretch of time so any change from start to end is visible.
What you'll do
Keep up the action for around 60 seconds. Because this can be tiring, Lantern shows a clear Stop, prompts you to rest, and frames it as "don't push into a crisis." You can decline the task entirely.
What it records
Neutral measurements of change over time:
- Start-to-end change — the difference between your first and last stretch (a change figure).
- Slope — how performance trended across the task.
Each is shown with its units and the method version used, plus a short note on what the task looked at. These describe change over time only.
What it does not do
It does not tell you whether any change means fatigue, weakness, or anything else. It records numbers; your clinician interprets them.
Not the same as
This is an original, own-authored task. It is not and is not equivalent to the MG-ADL, the QMG (Quantitative Myasthenia Gravis score), or clinical fatigability measures. This task does not reproduce them. Lantern does not measure breathing or single-breath counts.
Experimental. Not a cleared or approved medical device. Records neutral measurements only — no diagnosis, no interpretation. Rest whenever you need to.
See all the check-in tasks
Each task records one kind of neutral measurement — for reflection and conversation with a clinician, never a diagnosis.