Tbf, in person Anger looked skinnier than last year at the Tour de Ski and I read an article where he talked about loosing weight for the Olympics. With him specifically it could probably be that. With the rest it could really be the classic Calle "beach muscle training in the gym" approach... That said, maybe Italy should send Chiocchetti over to train with the Swedish men. The guy is over 2m tall, but one of the skinniest skiers and needs to work on his double poling power and technique (his diagonal stride is actually better).