'The guys from Team Grenade meet the Royal Marines at the RM Commando Training Centre in Devon, England.  The challenge was to tackle the actual Royal Marines Endurance Course, so the team needed to be in best ever shape.   Here, we focus on three of the Grenade elite athletes, Jamie, Kirk and Shane, as they prepare in the gym for this toughest of challenges.   Grenade were there shooting a high-impact trailer promoting the new 50 Cal pre-workout - but the course itself was the real thing, no sortcuts. Thanks to the Commando Training Centre Royal Marines for all their help on an amazing day.  More on Grenade 50 Cal and Grenade Fatburner at http://www.grenadefatburner.com/  Jamie\'s workout plan available from http://www.MyVideoPT.com  ** This channel is editorially independent of any sponsor, and no fee is ever paid to the channel creator for product placement. Occasionally, expenses such as travel are covered by third parties. Information on products and third party websites is given purely as a service to viewers. The channel creator has final editorial say over all channel content. This channel does not use \'robo-views\' or any other form of paid for clicks.**' 

Tags: royal marines training , assault course , commando training , US Marines (Organization) , Marine (Job Title) , kirk miller , endurance course , jamie alderton , grenade jay , team grenade , shane raymond

SEE ALSO: Kr , fbb , hiit , get fit , Bikini fitness , fitness trainer , fitnessm , flacher bauch , AH , hip hop