I have had this problem twice now – both times when attempting LEL. In 2017 I thought it was related to a shoulder problem so this time around (2022) I did a lot of work on my shoulder with help from the people at my local Chiropractic College. The shoulder was fine, but the leaning still came on after maybe 900km or so. In 2017 it came on later in the ride so I soldiered on and completed the event. This time there was just too much left to do so I threw in the towel. I am not 100% sure but I think this time I was leaning to the other side than last time.
In between these two LELs I successfully completed PBP in 2019 with no problems at all.
With me it is definitely not a balance issue. When I look down at the bike, I can force it back to the upright position but the remedy is temporary. There was no pain associated with the lean until the effects of pedalling with the bike at an angle started to have a detrimental effect on my core – I believe this was a secondary consequence of the leaning.
After a short rest I can set out again with the bike upright and feeling normal, but the leaning soon returns.
After a day or two off the bike there is no sign of the problem at all.
I do quite a few core exercises as part of my 2 or 3 times a week routine, including side bridges. I did a few core exercises this morning (about a week after pulling out of LEL) and nothing felt our of the ordinary. I am 64 years old.
I would dearly like to work out what is causing this as, if I am unable to find something I can work on, I doubt I will attempt anything over 600k in the future.