The 5 a.m. club has famous adherents, from Gwyneth Paltrow to Michelle Obama, but now there’s a new frontier in extreme early-rising: when it comes to viral morning routines, 4 a.m. is the new 5 a.m.

The actor and musician Jeff Bridges discusses how to “let it do you,” why almost dying was a gift, and his new album, “Slow Magic,” in an interview with Amanda Petrusich. The danger behind ...