A wellness reflection on what the body actually does overnight, why it matters more than we thought, and how the conditions for deep rest can be gently invited back in.
By Odi · May 2026 · 5-minute read
I have been reading Matthew Walker's Why We Sleep — the work of a sleep neuroscientist who directs the Center for Human Sleep Science at UC Berkeley — and I cannot stop thinking about it. The book makes a quietly powerful case that I want to share with you, because of all the things we do to look after ourselves, the one we most often neglect turns out to be the most foundational.
We tend to think of sleep as the absence of activity — the body switching off, the brain resting. The science says almost the opposite. Sleep is one of the most active, intricate, and necessary processes the human body performs.
In a single night, we move through roughly four to six 90-minute cycles, alternating between two distinct kinds of sleep. Non-REM (deep sleep) is when the body repairs tissue, consolidates memory, and releases growth hormone. REM (rapid-eye-movement) sleep is when the brain processes emotion, integrates learning, and engages in the kind of integrative cognition we experience as dreaming.
And during deep sleep, the brain's glymphatic system — a kind of overnight cleaning crew — flushes out the metabolic waste that builds up while we are awake. Including, notably, the protein fragments associated with Alzheimer's disease. There is no other time of day when this clearing happens.
In short: sleep is when the body does its most essential repair work — work that simply cannot happen at any other time.
Walker draws on decades of clinical research suggesting that consistent, adequate sleep may:
The recommended amount for most adults is 7 to 9 hours. Walker is direct about this: there is no evidence that anyone can train themselves to need less. We may convince ourselves we are fine on six — but the body and brain pay a measurable cost.
In Therapeutic Reflexology, we work with the feet as a map of the whole body — including specific reflex points that correspond to the pituitary and pineal glands, which govern melatonin production and circadian rhythm. We also work with the brain-stem and solar-plexus reflexes, which influence the autonomic nervous system. Sessions that gently engage these areas may support the kind of nervous-system regulation from which restorative sleep becomes more accessible.
In Bowen Therapy, we work with the fascia and the nervous system, holding space for the body to soften out of fight-or-flight and into the parasympathetic state — the state from which deep sleep becomes possible. It is hard to sleep deeply when the body is still bracing.
In Reiki, the deep, held stillness of a session often resembles the early stages of sleep itself — a parasympathetic state the nervous system rarely reaches during waking life. It is not sleep, but it is a near neighbour.
Walker's research and the work we do are speaking the same language. We are both, in different ways, working to give the body the conditions it needs to repair itself.
A few of the simplest evidence-informed shifts — none of which cost anything:
Consistent wake time. More important than bedtime. Even on weekends. The body's circadian rhythm thrives on regularity.
A cool, dark room. Around 18 °C is the optimal temperature for most people. The body needs to lower its core temperature slightly for sleep to initiate.
Morning sunlight. Ten to fifteen minutes of natural light within an hour of waking helps anchor the circadian rhythm and supports melatonin release at the right time that evening.
Mind your caffeine. Caffeine has a half-life of 5 to 7 hours. A cup at 2 p.m. is still active at bedtime. Many people sleep better when they keep caffeine to the morning only.
Be honest about alcohol. A glass of wine can feel relaxing, but alcohol is one of the most powerful suppressors of REM sleep. The body sleeps; the brain does not rest as deeply.
Reduce screens before bed. Blue-spectrum light delays melatonin release. A wind-down routine without screens for the last 30 to 60 minutes of the day helps the body know it is time.
I encourage you to give yourself a full week of prioritising sleep — the way you might prioritise an important appointment. Pick one of the practices above. Notice how you feel.
And if your sleep has been disrupted by stress, perimenopause, chronic pain, or simply a busy life — this is a beautiful conversation to bring into your next reflexology, Bowen, or Reiki session. Working with the body's nervous system is one of the gentlest ways we have to invite sleep back in.
Sleep is not a luxury. It is, perhaps, the most generous medicine the body knows how to make for itself.
Health in Balance.
With warmth, Odi
Reference: Walker, M. (2017). Why We Sleep: Unlocking the Power of Sleep and Dreams. Scribner.
This article is shared as a wellness reflection and is not intended as medical advice or a substitute for medical care. If you are experiencing persistent sleep difficulties, please discuss them with your doctor.
If stress, perimenopause, chronic tension, or simply a busy life has disrupted your sleep, we can weave a focused conversation about it into your next reflexology, Bowen, or Reiki session. Just mention it when we begin.
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