In my gym we have a seated leg curl that it’s rare, because you can’t put the upper mattress in my quads, I only can put it on my knee, and when I do this exercise, I feel that I’m not doing so much, but I think that is an old machine and that is the reason.My question is if I could change that for lying leg curl becaise I think that I can’t solve this problem.
The lying leg curl still works the hamstring. The main difference is just how stretched the hamstring is. Lying hamstring curl provides a better contraction due to the hamstring being worked in it’s shortened part (iirc), while the seated curl is the hamstring being worked in it’s lengthened part.
Either way, if you don’t feel your hamstring working on that particular machine you’re speaking of then you probably shouldn’t be using it.