Hi! I know I’m late to this thread but I was wondering the same thing- if gastroparesis is progressive.
This is how it started for - Well so I have colonic inertia for sure and possibly gastroparesis (according to dietitian) About 6 years ago I had suddenly felt something had switched off in my stomach, turned out that was the beginning of my chronic constipation issues. So For about 6 months I self treated with colonics. I'm assuming that could've possibly made my situation worse but it was temporary relief at least as I could easily go two wks, if not possibly longer without passing any stool at all.SORRY FOR THE TMI! Finally after 6 months my Gastroenterologist put me on 290mg linzess with 17 mg of miralax .. luckily it worked for me. Anyways, fast forward to 3 years after being diagnosed with colonic inertia - I got pregnant and suddenly start having acid reflux and vomiting every single morning. I figured this was temporary but no... it's now been 4 years since I had my daughter and I still have acid reflux (not vomiting thank goodness ) and for awhile I also had early satiety, nausea, and just this overall feeling of feeling like dreadful. I searched for a nutritionist and that helped me a bit, she taught me about macros and slowly increasing them so I was able to increase my calorie intake bc I was def malnourished even tho I was heavier than normal bc I was always bloated ... then after no more results came from that I switched to a dietitian- and she was able to get me off linzess and miralax and swapped it for magnesium- since then i haven’t had bloating. She also suggested some bitters for acid reflux and some enzymes to breakdown my fats, proteins and carbs- which I’ve been taking . My dietitian is now telling me she suspects I have gastroparesis which really upsets me bc I def didn't have the symptoms of it years ago when I was first diagnosed with colonic inertia which leads me to think I developed gastroparesis from having colonic inertia for so long and prob sped up with being pregnant maybe even the linzess was a contributing factor? The reason she thinks I have it bc I had a setback about 3 wks ago where my bowel movements weren’t feeling complete and I was having early satiety again and a lot of acid reflux. My concern is also whether or not gastroparesis (which we assume for now till I get tested is what I have) is progressive or can my diet maintenance and workout help keep it at bay? Rn I’m back on mostly liquids and very soft textured foods, low fiber and low fat in hopes that’ll clear me up and get me back to some regular healthy bowel movements. I would say that mine has progressed sorta.. improved since pregnancy but being pregnant caused so many other issues afterwards as I mentioned. I’m just scared up to how far I’ll progress one day.. I’m sure most ppl on here share that fear :/

Also since I haven’t seen this mentioned anywhere yet, There’s an article on ncbi.nlm.nih.gov -( can’t post the link )
suggesting that gastroparesis also causes smooth muscle atrophy so it’s been suggested to me by my dietitian to continue working out (I do weight lifting) to prevent or slow down the deterioration of my muscles. So just some info for everyone in case they can try and get a workout in.. hopefully it’ll help slow down progression of muscle atrophy.