it's not that bad once you get in to it , has he told you what your doing yet?? If not ask him to do abit cross fit / cave man training with you and let me no how you get on
Oops forgot to add if you haven't done cross fit / caveman training before be prepared to take a day off work the next day haha I thought I was fit until they hit me with this type of training I soon realised I wasn't haha