One killer exercise that's really great is pull-ups with your legs out level. That's my favourite. It's such functional core strength, and that's why I can climb up trees and down vines.
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About Bear Grylls
Bear Grylls was a 21st-century British adventurer, writer and television presenter. Edward Michael "Bear" Grylls is a British adventurer, television presenter and former SAS trooper. He holds several world records in hostile environments, and appeared in numerous wilderness survival television series including Man vs. Read more on Wikipedia →