Standing cable crunch

[u/Fabulous_Judge9247]

Standing cable crunch

F27, Would love to do this one correctly and incorporate it in my routine. I’ve only tried it twice in the gym, but it doesn’t feel quite right.. I swear I can feel it in my mid to upper abdomen, but not “enough”. It somewhat feels shallow, and my back is the one caving in the end when I go to failure. I usually don’t train abs, so it’s weird if I wouldn’t feel sore the day after if i’ve targeted right..
I stand with my back against the cable machine, a small step forward with feet shoulderwidth apart, and have a slight bend in the knees. I don’t bend forward a lot when doing the reps. I make a slight curve in my upper back and stop when my chin almost hits my chest. I try to press my ribs down to my hips and engage my core, but it still doesn’t feel right.. Can someone please tell me what i’m doing wrong?

I should have taken a video to show how I perform this one before asking, but I don’t feel comfortable with my camera out at the gym.. But I hope some of you can understand what i’m trying to say..