September 2015 Core Challenge
September 2015 Monthly Core Challenge
This month’s core challenge revisits a past challenge with GHDs and Back Extensions. If you’re a “newbie,” please make sure you have watched the demonstration below and then decrease the sets (as recommended each week).
For this challenge, you will be doing sets of 10 GHDs (Glute-Hamstring-Developers) and 10 Back Extensions as one set of work. If you are new to GHDs, you will do one set fewer than veteran athletes. Also, if you can’t make it into the gym, you may substitute sit-ups for GHDs and Supermans for Back Extensions.
See the photo below for Weekly sets: