hey thanks for the advice Johnny 5. I guess what I'm really trying ask is can the Jungle Gym XT substitute a set of rings in terms of versatility of upper body exercises (i.e. muscle ups, front lever back lever and so on). I know for a fact it is possible to do a muscle up on as i have seen a video on youtube.
Futhermore would you say in terms involvement of core muscles during use ,would rings be better option or it comparable between the two.
Thanks in advance