Taken from the official Final Fantasy site:
“Hello! Toyama-san from the animation team here! I really like to get into character when I work on #FFXV and today, I would like to show you briefly how we create animations for Prompto.”
“This is how we animate Prompto!
“So, that is how we create animations (see previous posts). Who thought animators need to be in shape and athletic? Well, athletic or not, we will continue to do our best! I’ve got to get back to work but I hope to see you again!” – Toyama-san (FFXV Animator)