I’ve had 2 professional fits done in the past - one back in 2013 when I first started cycling and then more recently in June 2018 (to address saddle pain on longer rides). The one in June 2018 ended up switching me to a new saddle and raising it up quite a bit compared to the 2013 fit.
I noticed some nagging knee pain later in 2018 while riding but I thought it was mostly from my running volume. Then I started to get some IT band pain towards the end of the year in addition to the knee pain even though I was taking a break from running after my 8K race in late November. To complicate things, in December I changed my group-set and ended up going from a 175mm crank arm to a 172.5mm. To compensate, I raised my saddle a couple mm and moved it forward slightly. That seemed to help a bit at first but I’m still having some IT band pain that is now showing up off the bike.
Since I don’t want to constantly rely on pro-fits ($$), I started researching this a bit on my own and I came across https://bikefitadvisor.com/ and this free online tool https://www.obstri.com/fit/ to measure angles from slow-motion video I captured on my iPhone. Based on the measurement of my knee at the top of the pedal stroke (71 deg), it seems that I may have raised my saddle a bit too much. I’m going to drop it down a bit closer to where it was originally from my 2013 fit since I never had any knee/hip pain between then and the fit in 2018.
I used some green sticky dots to mark locations on my hip, knee, and ankle based on some info from the bike fit adviser site and videos. The hip one fell off while I was pedaling but I did manage to get an angle marker on it in a prior frame.
If after a few months of trying to DIY it I still have pain then I’ll probably go back for another professional fit, but these free tools online are pretty cool so I thought I’d share.
Here’s what my setup looks like before I lowered my saddle. The family woke up so I ran out of time to grab new measurements after I lowered the saddle - so I’ll try to get to that later tonight once the kids are sleeping.
If anyone has any advice/suggestions, I’d love to hear it.