Soreness after hanging

I’ve been at PE for almost 6 months now and have been hanging seriously for about 2 months. Started at 5lbs and have added maybe 3lbs since then. My smallest weights are 2.5lbs so I used a filled 16.9oz water bottle to add a bit more weight and just recently added another one. Question being over the past few days I’ve noticed a bit of soreness in what feels like the ligs inside my abdomen. Not severe type of soreness but more like a “I worked my muscles hard in the gym yesterday” type of sore. I don’t find it extremely concerning but I wanted to ask the folks here that are more knowledgeable than I. Thanks in advance.

I’m a hanging newbie but I’m getting the same feelings and bib said it’s a good thing. It’s fatigue and necessary for growth.

Ah, good. I’ll keep up the good work then. Thanks!