Update, big update. I´ll try to make it short and simple. Last weekend smell and gas incontinence came back, after a session of mountain bike of 6 hours, but also got worse a pain i always had, a pain that started almost at the same time as my smell problem, a pain in my right leg, and the ass, rectum. That pain got better after prolonged time in bed, but started to get worse and worse as i elevated my mountain bike training intensity.
This Monday i managed to get an appointment with a kinesiologist on the same day, i was still smelling bad so i apologized and explained about my problems, my pain in the leg and ass. He just asked me to lay face down on the floor, he palpated really hard all my butt, asked me to turn face up and did some rotations movements, extensions, etc. with bot of my legs. Then he started to focus on my right leg, some stretches i never did, and a little of strength exercises. Next day i was feeling awesome again, the pain was tolerable, and again zero smell and gas incontinence.
What he told me i have? Piriformis syndrome, both of my piriformis muscle were hard and contracted almost like a ball, messing with my nerves, specially sciatic and pudendal, why squats and kettlebell swings worked so well with me? Because in the way i did them somehow i stretched that muscle and engaged the other muscles letting the piriformis "rest". Yesterday i saw him again, measured my leg range movements and said that both of my piriformis are abnormally short as the lateral rotation of the legs are extremely limited.
By the way, prior to that i got removed the sns device, i wasn´t using it, and i never liked having that kind of things in my body. I want to do an mri focused on the gluteal muscles and nerves to see if the doctors can see anything unusual related to the the piriformis.
So, on the bad side, no more mountain bike for me, at least not for serious. And no, i didn´t develop this with mountain bike since the symptoms and limited mobility (i always had problems with that rotations in sports like soccer, i was hard as a tree) were present before.