The victims “relaxed position” suggests that the cause of death was asphyxiation.   The victims of Pompeii died a horrible death. Many times it was not, however, the high temperatures or crush injuries that killed them. It was suffocation (and lack of oxygen) that killed the victims.   https://www.chemistryworld.com/news/elemental-analysis-sheds-light-on-pompeii-victims-final-moments/4018044.article