When I hold the hollow body position for more than around 10 seconds I get an ache/pain in my lower back even though my lower back is firmly on the ground for this exercise.
Also when I do moves related to L-sits my lower back feels the same pain. I was wondering if you guys have any ideas on what may be causing this and how I can fix it. From browsing other threads I think it may be related to lack of mobility in my legs but I am not sure.