Alexander Skarsgard got in shape for 'The Northman' thanks to Magnus Lygdback's 1-Hour Workouts

'He is the most hardworking, humble guy,' the Swedish trainer, who has worked with Harry Styles, Britney Spears, and Alicia Vikander, tells THR of his friend and client.Magnus Lygbäck isn't one to mess around. The Swedish trainer and nutritionist are credited with perfecting superhero-like physique