Hard to start, hard to stop.

Brain Library · Inertia and Hyperfocus

Many autistic and ADHD people experience inertia: it’s hard to start, stop or switch. Hyperfocus is the other side of the same coin.

It’s about momentum, not laziness.

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How momentum works

A brain in motion tends to stay in motion.

A ball on a line: it takes an extra push to start, and an extra push to stop.

1 · At rest — Hard to start

You know what to do, but getting going takes a big push.

2 · Rolling — In the flow

Once moving, focus can deepen into hyperfocus.

3 · Full speed — Hard to stop

Stopping or switching takes just as big a push.

Inertia can feel like

Knowing what to do, but your body won’t start
Waiting mode: time slips by, stuck in place
Switching tasks feels like hitting a wall

Same engine.

Hyperfocus can feel like

Hours vanishing in what feels like minutes
Forgetting to eat, drink or use the bathroom
Interruptions landing like a jolt, not a tap

Getting moving

1. Tiny first step.

Make it so small it barely counts: “just open the laptop.”

2. Body double.

Have someone nearby, in person or on a call, while you begin.

3. Transition object.

Carry a song, a mug or a fidget from one activity into the next.

4. Timers with warnings.

A 10- and 5-minute heads-up beats one sudden alarm.

Coming back up

1. Set alarms before diving in.

Decide when to surface while it’s still easy to choose.

2. Leave a bookmark.

Jot down where you stopped so letting go feels safer.

3. Water and a snack nearby.

Care for your body without breaking the flow.

4. Gentle landing ritual.

Stretch, look outside, take a few slow breaths before what’s next.

Find your momentum.

Take these slowly: on your own, in a session, or with someone you trust. Skip any that don’t fit.

What kinds of tasks are hardest for me to start? What do they have in common?
When have I been in deep flow? What pulled me in, and what did it feel like?
Which “tiny first step” could I use for something I’ve been putting off?
What helps me land gently after a long stretch of focus?
What would I like the people around me to understand about my momentum?

Try this week

Pick one tip from the front. Try it twice, then note what shifted.

For reflection and practice, not diagnosis. Bring it to your next session if you’d like to talk it through.