Workers are taking just 33 minutes for their lunch break, with many believing they are more productive if they skip a meal during the day, according to a study.
A survey of 1,000 workers revealed that almost half said they could concentrate better if they have no lunch.
A similar number of those questioned by Pizza Express said their employers do not encourage them to take a full hour for lunch.
Rebecca Farrer of Pizza Express said: "It's easy to feel like you can't escape for lunch on a busy day, but taking time out allows you to push the reset button so you can tackle the afternoon head-on."
The average lunch break lasted from 12.41pm to 1.14pm, the research found.