More than half of those working from home estimate they're sitting down for around two hours and 40 minutes longer per day, a new survey has found.
The Ipsos MRBI survey for the Irish Heart Foundation (IHF) also found that one in four workers who are sitting for longer are remaining sedentary for at least three hours more than previously.
The IHF is calling on workers to move for a minute each hour while they're working.
IHF spokesperson Tara Curran says many of us aren't active enough because so much work is now being done online.
She explained: "There are many reasons [why] people's daily routine has changed - we're no longer commuting to work; we're doing video calls instead of attending meetings; we're instant messaging colleagues instead of popping over to their desks.
"Really our new way of working has led to us being a lot more sedentary."
She says her organisation is also calling on employers to "make an effort to shorten meeting times on video conferencing".
The IHF says that being physically active can help relieve stress, boost mood and improve self-esteem.
They also recommend a quick stroll for anyone in a stressful situation at work, as it can help "clear our heads while also helping our hearts".