Was he tired all the time? It's been shown that shift workers never fully adjust to sleeping during the day. Children and teens need a lot more sleep than adult

Was he tired all the time? It's been shown that shift workers never fully adjust to sleeping during the day. Children and teens need a lot more sleep than adults, so it's particularly hard for them. As a teen I worked in a bakery and later as a pastry chef, both of which involve very early starts. I loved the work, but that early alarm never got any easier.