IBS is TMS, assuming other causes are of discomfort are ruled out. BUT I’m discovering that there are a few physical factors at play that can ease or exascerbate irritation in a sensitive gut, even when the underlying cause of that sensitivity is tension. I’m currently working to figure that all out in myself.
So this is not exactly a TMS answer - but it’s related because I think the TMS gut is quicker to fire off over small physical irritations. Obviously the bulk of the work should be addressing the underlying emotional tension, but in the meantime I think a little gentleness toward the physical side helps.
I saw that you mentioned fitness and a healthy fiber diet, which reminded me of one piece of my puzzle. So often for people with gut trouble and constipation, the offered solution is “more fiber.” But when I went vegan (not for digestive or health reasons) on top of an already high-fiber, whole food vegetarian diet, I think I increased the fiber in my diet too quickly for my gut microbiota to adjust. (I already had IBS long before that, and going vegan may have benefited other aspects of the condition, but the bloating got worse.) The bloating persisted for YEARS until a nutritionist pointed out that I was eating a super high-fiber diet. I decreased my fiber intake to a point where I started feeling less like a balloon at the end of the day, existed at that level for a while, and then sloooooowly, SLOOOWLY started increasing the fiber again (and started on a good probiotic - which also had to be done gradually) until I was eating the diet I wanted. I hadn’t appreciated just how gradually my gut needed to adapt to additional fiber, especially since I wasn’t taking fiber supplements or anything, just eating food. After gradually reintroducing more fiber, I’m much less bloated now at a similar level of fiber to what had been too much before.
I had read about the gut needing time to gradually adjust to additional fiber, but I figured a fast switch just meant enduring a few days of bloating until things recalibrated. But that’s not what happened. I was off-balance until I backed off on the fiber and started over years later.
ALSO an increase in gassiness can lead to constipation (an overgrowth of crucial-for-our-survival methane-producing bacteria can cause too much methane to be produced in the gut, which has a motility-slowing effect on the cells). That’s just one way that bloating and constipation are related, and one way that increasing your fiber too fast and throwing your microbiome off-balance can lead to these symptoms. I’m still working on all of this myself, but I think it’s worth a look. (I’m still working through the constipation part, but weirdly only in the evenings. It’s a mystery.)
This may not be relevant to your situation, but since you tied the onset to the beginning of your fitness journey (not assuming you’re vegan or anything, just assuming you probably started eating more whole foods), I thought I’d mention it. Hope it’s helpful for you or someone else! I hope your pants fit and your visits to the toilet are quick and easy soon! ;-)