Neck posture and muscle activity with and without head support in a reclined sitting posture when watching IFE

M. Smulders, Alessandro Naddeo, N. Cappetti, Elmer van Grondelle, U. Schultheis, Peter Vink

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific


In designing a headrest it is important to define the ideal head position and neck angle. There is literature on the ideal head position, but not in the context of watching IFE in a business class aircraft seat. In this study (n=21) the neck muscle activity (EMG), expected long-term comfort and head/neck inclination were studied in a reclined position (as is possible in business class) when watching IFE in the condition of with and without head/neck support.
It appeared that there were no significant differences in EMG between both conditions. However, the posture was significantly different; without head support by a headrest the head was found to be more upright. Expected
long-term comfort was rated highest in the condition with a headrest.
The fact that no difference was found in EMG indicates that humans tend to look for a head position that is neutral, in the sense of minimal (muscle) effort. Head support in a reclined position may have a positive psychological
effect on the user.
Original languageEnglish
Title of host publicationProceedings of 1st International Comfort Congress
EditorsAlessandra Naddeo, Nicola Cappetti, Mariarosaria Vallone
Place of PublicationSalerno, Italy
Number of pages10
Publication statusPublished - 2017
Event1st International Comfort Congress - Salerno, Italy
Duration: 7 Jun 20178 Jun 2017


Conference1st International Comfort Congress


  • EMG
  • posture
  • neck angle
  • aircraft seat
  • neutral head position
  • headrest


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