![Sleep researcher Ferran Barbé (courtesy).](https://imagenes.elpais.com/resizer/v2/6NIIA5TCQVGDHMMPAPBW25S5IQ.jpg?auth=c41e5f0c8886dcd07b8212e30141d7db9fb1f6c7f5b44fdba533597608ccf0d3&width=414&height=233&focal=820%2C612)
Ferran Barbé, sleep researcher: ‘Changing the time impacts our mood and ability to focus for three days to a week’
The expert advocates ending the practice of resetting the clock twice a year and sticking with the winter time
The expert advocates ending the practice of resetting the clock twice a year and sticking with the winter time