Fitness Anywhere Online Community » Performance Training » Monthly Challenges » TRX Core Challenge » Core challenge A Core challenge A Last post 02-09-2009 12:20 PM by jhill0084. 1 replies. Page 1 of 1 (2 items) Sort Posts: Oldest to newest Newest to oldest Previous Next 02-09-2009 11:26 AM DeborahB Joined on 02-03-2009 Posts 5 Points 40 Core challenge A Reply Contact  After doing the workout a few times, I now have the hang of it and can focus more on my form to get an even better burn Post Points: 20 02-09-2009 12:20 PM In reply to jhill0084 Joined on 10-01-2008 Alabama Posts 107 Points 1,255 Re: Core challenge A Reply Contact You are so correct. There is definitely a muscle learning curve to the TRX. I love it every time I use it. Good luck Post Points: 5 Page 1 of 1 (2 items)