When it comes to preparing for the great outdoors, indoors, few movements are as suited to building mountain legs as the humble box ... step-ups, was used by Chad Wilkinson to prepare for high ...

few movements are as suited to building mountain legs as the humble box step-up. The CrossFit Hero WOD ‘Chad’, which challenges you to do 1,000 reps of weighted step-ups, was used by Chad Wilkinson to ...