Hi Jennifer E -- Natalia from the Pilates Anytime team here!

Usually when an instructor is referring to having all of the springs on, the intention is to have 100% of the springs hooked on to help keep the carriage of the Reformer steady and in place. You will usually see this instruction for things like Short Box exercises like Round, Twist, Around the World, and Tree.

Natalia G This video said "all cords on" was like "two on a Balance Body". Between that and the fact that the exercises were to jump on the tramp made me understand that I shouldn't use all 5 springs on a merrithew. I was just hoping for more direction on what springs/resistance the instructor was going for (as even two springs on a balance body can vary widely depending on which springs they are)

Hi Jennifer E -- thank you so much for clarifying!

In this case, when Amy mentions the two Red Spring on the Balanced Body Reformer, two of the 100% Merrithew Springs could serve as a good option.