It's been a year or so since i've had my position on the bike looked at, and inspired by
Gem's recent visit to Cyclefit, I decide to haul my arse down to York Cycleworks, and have myself looked at. I've been having back pain which kicks in after about 60 miles, and a left hamstring that spasms after about the same.
The fit began with the chat about my riding volumes and expectations, and what I was hoping to get from the session. Sam the fitter was good to talk with, and was happy to answer all my questions as we went along.
Early into the session he spotted my right foot that kicks out when I stand (externally rotated), and having put me on the physio table he also found that the outside of right foot twists downwards and is lower than left when both legs are hanging in space. Both these factors would add up once I was on the bike and would make themselves apparent as lateral heel instability.
After a quick measure up of the bike, I hopped aboard and had a 10min warm up on the turbo while he fetched the teas. On his return , phrases like 'nice position' , 'very flat back' and 'really smooth pedal stroke' were mentioned, only then to be contrasted by 'your right foot is all over the place'!
Sam was pretty happy with the fit of the bike dimensions overall, but had a few improvements to try:
- My arches compress by more than 15mm when loaded, so some decent foot beds were slotted into my shoes, with some serious arch support. They felt quite odd at first but I'm looking forward to testing them out on the road.
- Saddle fore/aft. That came forward 15mm to remove the compression of the front of the hip as he felt I was slightly stiff there and it could be preventing smooth motion over the top of the pedal stroke. It would also allow greater deployment of the Glute Max hopefully increasing power.
- Finally, and most dramatically, he shimmed the cleat on my right shoe, so that the twisted foot would have something to push against. Immediately my right leg felt connected to the crank, and my eyes lit up. Sam could now see that my heel had stopped waggling around during the cycle of the pedal stroke.
Ironically, the importance of foot stability became very apparent on Sunday.
I rode the Scotton100 on my CX bike which i rarely do any distance on. It is fitted with eggbeaters which offer huge amounts of float and minimal stability. That evening my left knee was very sore and painful to walk on.
The real test will be this week when I get out on the chaingang and see what effect the changes make.
I'll let you know...