PR Friday — Post your training updates, PR’s, and questions to the comments and the 70′s Big crew will respond. 

Weekly Q&A gives you a chance to ask anyone from the 70′s Big Crew a question in the comments, on Facebook, or Twitter. 

Homework: Earlier this week I asked you guys to look up what muscles are involved in hip extension. Did anybody bite? I’ll get to this topic in the comments.

Meanwhile, look how small Z is.