This is general information, not treatment. If low mood is persistent, affecting your daily functioning, or accompanied by thoughts of harming yourself, please speak to a doctor. That is the right route and it is not an overreaction.
What happens in a northern winter
At UK latitudes, daylight in December is short, and much of what there is arrives while people are indoors. Many people leave for work in the dark and return in the dark, and the total light exposure across a winter day can be a small fraction of a summer one.
Light is the primary signal that sets your internal clock. Reduced and delayed light exposure shifts that clock later and weakens the rhythm, which affects sleep timing, alertness and mood.
A proportion of people experience this strongly enough to meet criteria for seasonal affective disorder. Rather more experience a milder version: flatter mood, more sleep, low motivation, carbohydrate cravings, and a general sense of being harder to start.
What has the best evidence
Light. Bright light therapy has reasonable evidence for seasonal depression. The usual approach is a light box of adequate intensity, used in the morning for twenty to thirty minutes. If you are considering one, it is worth discussing with a doctor first, particularly if you have bipolar disorder or any eye condition.
Free version: get outside in the morning, even when overcast. Outdoor light on a dull winter day is still substantially brighter than indoor lighting, by a margin most people find surprising.
Exercise. Reasonable evidence for effects on depressive symptoms generally. The effect is more reliable for regular, sustained activity than for occasional sessions, and outdoor daytime exercise combines it with the light.
Routine. Keeping consistent wake times, meal times and activity through winter supports the rhythm that the reduced light is weakening.
Talking therapies and medication, for people whose symptoms warrant them. Cognitive behavioural therapy adapted for seasonal depression has evidence comparable to light therapy.
Where practice fits, honestly
Inside the exercise category, mostly, plus some specific contributions.
It is achievable in a dark February at six in the evening when going for a run is not. Something that actually happens has more value than something better that does not.
The breathing and stillness components have their own support for anxiety and stress, which frequently accompany low mood.
It provides structure and a reason to do something, which matters more than it sounds when motivation is the thing that has gone.
Morning practice near a window, or better, twenty minutes outside first, combines the two interventions with the best evidence.
What it will not do is substitute for treatment if what you have is a depressive episode. That is worth stating plainly, because the wellness framing around this often implies otherwise and people delay getting help.
Practical winter structure
Morning: light first if at all possible, before or during a short movement session. Fifteen minutes outside beats thirty minutes of anything indoors for this specific purpose.
Daytime: get outside at lunchtime. This is the brightest light available to most people on a working day and it is frequently skipped.
Evening: keep it gentle. A slow session with long exhalations supports sleep, which is often disrupted and which feeds back into mood.
Consistency over intensity. A short daily session through January is worth more than an ambitious plan abandoned in week two.
When to see a doctor
If low mood persists for more than two weeks, if it is affecting work or relationships, if sleep or appetite have changed significantly, if you have lost interest in things you normally enjoy, or if you have thoughts of harming yourself. The last one warrants contacting someone today.
Where a teacher helps
Motivation is the thing winter takes, and a booked session at a fixed time requires much less of it than deciding to practise alone in a dark house does. That is a small practical advantage and in February it is not a small one.
Sessions are live on video, thirty or sixty minutes, at times that suit.
Questions people ask
Does yoga help seasonal low mood?
It sits within the exercise category, which has reasonable evidence for depressive symptoms, and its breathing and stillness components have their own support for stress and anxiety. It is not a substitute for treatment if you are experiencing a depressive episode.
Do light boxes work?
Bright light therapy has reasonable evidence for seasonal depression, typically used in the morning for twenty to thirty minutes. It is worth discussing with a doctor first, particularly with bipolar disorder or any eye condition.
Is getting outside really enough in winter?
Outdoor light even on an overcast day is substantially brighter than indoor lighting, by a larger margin than most people expect. Getting out in the morning or at lunchtime is the most accessible version of the intervention with the best evidence.
When should I speak to a doctor?
If low mood lasts more than two weeks, affects your work or relationships, changes your sleep or appetite significantly, or removes interest in things you normally enjoy. Thoughts of harming yourself warrant contacting someone the same day.
A senior yoga teacher at IndieVeda, teaching one-to-one sessions live from India.
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