For the main activities Reading, Staring/sleeping, Talking and Working on laptop, the top eight most observed postures are shown in Table 2. It was verified that for this selection of eight postures, the morphological group had a distribution similar to the overall observed train passenger population.
Table 3 shows the observed posture– activity combinations and the corresponding comfort scores. Different postures were observed per activity and comfort scores varied in relation to the combination of posture and activity. For Reading, the posture with the highest comfort score was the posture with the head upright, the trunk backwards and full seat contact. This posture was also observed as one of the most corresponding postures of the three other main activities, but not with the highest comfort score for these activities. For Staring/sleeping, the posture with the highest comfort score was the posture with the head upright, the trunk upright and full seat contact. This posture was also observed in combination with reading and working on the laptop. Talking was rated highest on activity related comfort with the posture with the head sideward, the trunk backwards and full seat contact. This posture was also related to Staring/sleeping with a lower comfort score. For the activity Working on laptop, the comfort notes showed the least variation. The posture with the head forward, the trunk upright and with full seat contact was with 7.5 just higher than the other three postures. This posture was also one of the most frequently observed postures for reading.