Extended periods sitting behind a desk are linked to an increased risk of illnesses such as type 2 diabetes and heart disease.
Even with factors such as age, smoking and amount of exercise taken out, higher health risks still exist for those who sit for long spells at work, according to research.
Around half of the UK working population have sedentary occupations - most notably office-based jobs, where more than 75% of the working day is spent sitting.
Today, health specialists from across Wales will gather in Cardiff on a seminar relating to the risks of sedentary behaviour at work and discuss ways in which to reduce it.
Sitting at work is the main source of sedentary behaviour for many working age adults...We'll also be encouraging delegates to take regular breaks in their sitting time throughout the seminar, in order to ensure we are all practising what we preach.
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Hundreds of people braved the rain and high winds to join the Big Sleep Out at Cardiff Castle on Saturday night raising more than £100,000.
Strong winds up to 70mph are expected this morning until 9am.
Monday will be dry and bright with plenty of sunshine and easing winds throughout.