I started having some mild discomfort in May, five months ago. Always was triggered by walking. Intermittent, some days had it, some days not. On days when I do not go to the gym or bike, I do a 3 mile (~~4.5km) walk.
A neighbor had a party in June, after doing my walk and had some discomfort, went to her party in afternoon, and after four hours of standing, the discomfort clearly was pain while standing. Sitting helped reduce it.
Next day (still in Jun) called my Dr office (I think in UK you call that a GP). Saw him four days later, he suspected hernia. Sent me to the surgery part of the system - that took a month to get in.
July saw a surgeon, he had me get an MRI. Two week wait for the MRI. MRI indicated two minor hernias and torn abdominal muscle. He said the hernias were minor, too minor to cause the discomfort/pain, so it had to be the torn muscle. He sent me to physical therapy, but in this case specifically to Sports Medicine. The sports medicine group works on athletes, and my activity level apparently qualified.
Waited for a month, saw a Dr at Sports Medicine in late August. He looked at my MRI, did an exam and said that the previous surgeon was wrong, it is the hernia. During his exam, he said how does this feel and he pressed in a specific spot, and I said, that HURTS. He said he was sending me back to surgery and telling them they screwed up the diagnosis. I said this is now August, has been a problem since May, I have already canceled two vacaiton trips and now looking at a third. I really did not want to go back to the guy that screwed up a diagnosis. He then said he knew a very good specialist, he would call him.
And wait another month to see that specialist, saw him a few weeks ago. And the result of that meeting and exam, scheduled for surgery to fix two hernias, this coming Tuesday.
In my case it has only been a problem from walking or standing. At the gym I want to make sure I maintain muscle mass and bone density, so I push as hard as I can on several exercise machines, that has not triggered it. This year have not ridden any Brevets (UK translation - Audax), so have not ridden any 200k rides this year. But I have done a 90 mile, 75 mile and 70 mile ride this year, plus many shorter ones. Those rides and no other activities have triggered the problem, for me the only trigger is walking or standing a long time. Two days ago rode 17 miles, no problem.
That said, I suspect every hernia is different, so maybe cycling for you would be best done if you brought your phone with you so you could call someone and ask them to come and get you?
I was told to not do any core type exercises for two weeks after my surgery. Since my exercise routine at the gym is quite robust, I plan to NOT do any exercises or bike rides for three weeks, not just the two weeks that was prescribed. I was told walking is ok, but since that is what triggered the problem, I will limit my walks for the first couple weeks. I am retired, so I do not have anything like employment that messes up my schedule.
I am 71 years young. I did not do my backpacking trip this year, the first attached photo is me on my backpacking trip last year. Second photo, me again, Toronto Ontario in the background, last year. Sorry, photo is of my Lynskey, not a Thorn. Third photo, sunset on one of the evenings of my backpacking trip, was on the shore of lake Superior. Fourth photo, a Moose on my backpacking trip.
I will know more in three days.