11am: Breathing exercises to reduce stress spike. The Asics research found that it is after just two hours into desk-based work that stress levels start to rise – so about 11am if your working day starts at 9am.

“To combat this, do some deep nasal breathing in the morning,” Stubbs recommends.

Research from Stanford University found that just five minutes of breathing exercises can reduce anxiety, improve mood and slow breathing, which is a sign that the body is calm.

To try it, sit up in your seat and relax your shoulders. Inhale slowly through your nose, letting your belly rise and fill with air. Once your lungs are comfortably full, take another inhale of air to expand your lungs as much as possible. Then, exhale slowly through your mouth, making sure that it lasts longer than your inhale. Repeat for five to 10 minutes.

“This can help calm the nervous system and set our body and minds on a good foundation to be clear of mind and calm for the day,” Stubbs adds.

12pm: Eat a homemade lunch. More than half of the calories we eat each day come from ultra-processed foods (those containing ingredients you wouldn’t find in your kitchen cupboard, such as preservatives, emulsifiers and artificial flavourings).

A diet high in these foods is linked to a 30 per cent higher risk of depression in the future, and there are also links to obesity, type 2 diabetes, heart problems and even some cancers.

A homemade lunch that avoids ultra-processed ingredients and instead incorporates elements of the Mediterranean diet (vegetables, fruit, wholegrains, fish and olive oil) can help protect against these risks and improve mood, Stubbs says.

“Make something that includes a good amount of whole grains, such as wholewheat bread and brown rice, fish – especially those rich in omega-3 fatty acids – or lentils and pulses, which are a good source of protein,” he says. For example, this could be a tuna sandwich made with wholemeal bread, a chickpea curry with brown rice, or a lentil and vegetable soup.

2pm: Move for 15 minutes. It’s around halfway through our working day that stress levels spike – sitting around a fifth higher than they were at the start of the day – the Asics study found. However, taking a 15-minute exercise break reversed this effect.

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“Our recent research has shown that moving for 15 minutes, especially after sitting for a prolonged period of time, can reduce stress by 14.7 per cent and improve your state of mind,” Stubbs says. This could be a walk, which would add around 1500 steps to your daily count, weightlifting or a short HIIT (high-intensity interval training) class.

The positive effect of movement is thought to be down to it triggering the brain to release mood-boosting neurotransmitters, including endorphins, dopamine and serotonin, Stubbs explains.

3pm: Eat a piece of dark chocolate. Swap your afternoon biscuit for a bar of dark chocolate, a healthier option that can lift your mood, Stubbs suggests.

Dark chocolate is full of antioxidants and fibre and has been linked to lower blood pressure, healthier cholesterol levels and brain function. The afternoon is the ideal time for this snack, as it contains caffeine, which may disrupt sleep for some people if it is eaten in the evening, he notes.

Research from Stubbs and colleagues, which examined the daily chocolate consumption and mood of about 13,000 people, found that those who ate dark chocolate – about 100g a day – were around 57 per cent less likely to develop depression symptoms than those who didn’t eat chocolate.

However, bear in mind that 100g of dark chocolate will contain about 600 calories and 14g of sugar, so a smaller portion may be best. A single 10g square has still been linked to health benefits.

6pm: Avoid alcohol and go for a soft drink after work. Despite its initial relaxing effects, alcohol isn’t good for us. It harms our heart and brain and raises the likelihood that we will suffer from high blood pressure, stroke and cancer.

In Britain we’re told not to exceed 14 units a week (about six 175ml glasses of wine, six pints of 4 per cent beer or 14 single shots of spirit). However, “the research suggests that no level of alcohol consumption is associated with better health”, Stubbs notes.

So when it comes to after-work drinking, try to avoid it, he recommends. “Swap to a hydrating drink,” he suggests. “Try kombucha [a fizzy drink made from fermented black tea] or an alcohol-free option of your favourite drink.”

The Telegraph, London

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