Your nervous system is constantly taking in information. Light, noise, movement, screens, visual clutter, conversations, notifications, background demands.
Even on days where you haven't "done much," your brain may have been working incredibly hard just filtering input. That filtering takes energy.
When sensory load is high for too long, it quietly eats away at your stress tolerance. Your threshold lowers, because your system is already doing so much behind the scenes.
That's a big part of why your environment affects your mood and energy. The spaces you spend your days in either add to that load or give your system a chance to settle. It's why one room can leave you flat and short-tempered while another lets your shoulders drop.
(I wrote more about this in Understanding your stress threshold.)
Why do some spaces drain you while others don't?
As a Sensory Intelligence® trained practitioner, sensory thresholds are one of the first things I look at. Your threshold is how much input it takes before your brain notices and responds, and it can differ from one sense to the next.
People with a low threshold notice things quickly (the dripping tap, the tag in their shirt) and tend to reach overload sooner. People with a high threshold need more input to register it, so they often feel better with music, movement or a busy café. Most of us are a mix. These people are often “sensory seekers” the ones that love bungy jumps or motor cross.
Your threshold stays fairly stable, but your capacity shifts with sleep, stress, hormones and how much you've already taken in that day. That's why the same café can feel lovely on a Saturday morning and unbearable on a Thursday after a long week.
What does the research say?
The evidence is still building, but a few findings stand out. In one study, women working with low-level office noise in the background had higher adrenaline and gave up sooner on hard tasks, even though they didn't feel any more stressed. Another found women who described their homes as cluttered had lower mood across the day. And simply receiving a phone notification, without looking at it, has been shown to pull focus off a task.
Time in nature seems to work the other way, with modest improvements in attention. It's full of sensory information too, just the slow, gentle kind your brain doesn't have to work hard to filter.
Small ways to make your space easier on your nervous system
What helps will depend on your own thresholds, so treat these as experiments:
Notice which sense gets loud first. Noise, mess, bright light, being touched. Start there.
Clear one surface you look at often, like the kitchen bench or your desk.
Soften the light in the evening with lamps instead of overhead lights.
Give your phone a home in another room for an hour, or turn off notifications you don't need.
Use your body to settle. A walk outside, a stretch or deep pressure (a firm hug, a weighted blanket) can calm things faster than trying to think your way there.
If you lean towards needing more input, a very calm space might leave you flat. Music while you cook or a brisk walk might be your version of support.
A small place to start
Tonight, stand in the room you spend the most time in and notice what grabs your senses first. Choose one small thing to change this week and see how it feels.
And if you'd love to feel what a day of low sensory input does for you, my next Slow Day Offline retreat is on Saturday 14 November in Whakamarama. A day away from screens and notifications, with a massage included in your ticket. You'd be so welcome.
I also offer sensory assessments in my corporate wellbeing offering.
Frequently asked questions
How does your environment affect your mood? Your brain constantly filters what you see, hear and feel. Busy, noisy or cluttered spaces make that filtering harder, which can leave less capacity for stress and show up as irritability, low mood or tiredness.
Why do I feel drained at home sometimes when I haven't done much? Background noise, screens, stress, notifications and clutter all need processing, even when you're not paying attention to them. That load builds across the day and can leave you tired without an obvious reason.
What are sensory thresholds? A sensory threshold is how much input your brain needs before it notices and responds. Low thresholds notice quickly and overload sooner, high thresholds need more input. Most people are a mix.
