What Hafthor Björnsson's Diet Reveals About the Future of High Performance Nutrition Hafthor Björnsson, a renowned Icelandic strongman and actor known for his role as Ser Gregor "The Mountain" Clegane in Game of Thrones, has established himself as a benchmark for high performance athletes seeking to optimize their nutrition plans.
His impressive physique, coupled with exceptional strength and power, is the result of a meticulously planned diet that fuels his intense training regimen.
Björnsson's diet centers around a simple yet effective philosophy: "eat big, train bigger.