West 5 Cycles
Cycling, fixed-gear bike building and life on two wheels onlyArchive for Training
Powertap training
So I took the plunge – got hold of a powertap wheel and got on the programme figuring out just what sort of power all this fixie riding has made me capable of. As a good nerd I of course have coupled my purchase of the Powertap with the book ‘Training and Racing with a Power Meter‘ by Hunter Allen and Andrew Coggan – so I can be utterly nerdy and even (hopefully one day!) understand what all this new-found data actually means. (I think next time I’m in Boston I need to go back to the MIT campus store and buy one of their T-shirts that says either ‘God said: (very long formula with greek letters) and there was light!’ or ‘Talk nerdy to me’.. either will fit me perfectly.)
Anyway – it’s been an interesting couple of days. Partly because currently I’m having to use the roadbike as the wheel has a 10-speed hub, but I’m told there is a way of converting the hub to work with fixies.. so more on that later when I figure it out. Also, because all the data is really rather illuminating.
Firstly, the stress at work from the last month or so is really showing up in the ratio between heart rate and watt output. So initial readings were looking rather humble. However, it’s amazing how much decent sleep, proper food and getting back to training consistently can improve – even in a matter of days!
Secondly, looking at all the data and particularly my results for 5 sec, 1 min, 5 min and Functional Treshold Power (the kind of watt output one can sustain over a 1 hour time trial) I have already learned that all this fixie riding has given me a lot of endurance and skewed my cycling talent towards time trialling. This I have learned from my watt/kg figures – which look a lot better for the longer term power output than the sprinting. Hunter talks about ‘neuromuscular power’, which for me is apparently weak since I can’t generate massive sprints – or at least not yet.
The figures are improving every day so need to figure out just how big a set-back all the all nighters of late have had on my power generation and when the results start plateauing.. then it’s time for the serious training programme!
Knees up
Recently I’ve really felt the presence of my knees – in a bad way. The cold weather has certainly made them more susceptible to pain, but something else has had me quizzing for a while where the sudden pain came from. Riding fixed up hills has certainly exacerbated it, and yesterday’s 85km loop really had me suffering – I just couldn’t work out why it was so bad all of a sudden.
So today I had to refrain from rushing out to catch a little glimpse of sunshine atop my steed of speed and had to contend with looking at it instead. Just could not afford to make the pain any worse. To add to the confusion the pain was intense in my left knee, but not in the right and particularly bad when in a bigger gear or going up a hill, and less so when just spinning. The pain was mainly in front of the knee- just above the kneecap and occasionally shifted to the inside leg, just next to the kneecap. While out spinning yesterday I stopped on occasion to raise my saddle a mm or so as one of the tips for fixing pain in front of the knee is doing just that (whereas if you have pain the back of the knee, you have to lower your saddle).
This created temporary relief, but before I knew it the pain was back. Next thing I tried (when having pain on the inside of the leg) was to try to have my foot pointing a little outward.. there is a little float in my pedals, which allowed me to try it, but again – the benefit was negligible and before long the standard pain returned.
Mystified I eventually got home and promptly decided to compare my summer shoes and my winter shoes with one another. When buying my winter shoes I made a point of putting the cleats in the same place relative to the attachment points as where the cleats were on my summer shoes. Of course, what dawned on me when comparing them side by side was that there was a slight size difference between the two, the summer shoes are tighter and hence I picked one size bigger and the Winter shoes, more generously sized anyway to allow for warm socks etc. are a size smaller. This makes them equally comfortable when wearing them, but what I hadn’t realised was that the attachment points are proportional to the sole, and by putting the cleats in the exact same position from a mounting point of view actually meant that they were different places absolutely speaking.
What this meant was that whereas the positioning was perfect on my summer shoes, making the leg pivot exactly by the knee – on my winter shoes the pivot point was just a little higher, because the cleats ended up being further back on the sole. So with one pair of shoes I was pedalling with the ball of my foot and the other the pressure was more on the arch, rather than the ball – creating a totally different pressure point with the same technique. Albeit my feet feeling ok, it was eventually my knees that where complaining.
Why I only felt it on one knee as opposed to both is simply because one of my legs is a few mm longer than the other one – and thus the impact ends up being exaggregated on the shorter leg than the longer one, which is better able to compensate. I feel a lot wiser about it know, and happy I have figured out what was the cause of the pain – but still need to let my body recover. The cold weather makes joints even more vulnerable for sure and the next stop I’ve decided to do is book a Specialised Body Geometry fitting session – to iron out any more little niggles I might have in waiting that could take the fun out of riding. This little episode just illustrated how depressed I get when I can’t do my favourite sport for a while, so no reason to not do all I can to make sure this will continue to be a source of pleasure for me for many more years!
Pedal pushing (and pulling)
Interesting statement about riding fixed always mentioned is that it improves your pedaling technique. I will certainly agree as when you get used to the continuous revolutions, you begin instinctively to adapt into a smoother, more energy efficient way of propelling yourself forward. Less twisting and ‘battling’ with the bike than what you see with rookie cyclists. It’s amazing how much not being able to ‘cheat’ by coasting focuses your mind on making the most of your pedaling power.
Another interesting detail I have been battling with for a while is how to go down hills at a super-fast cadence, without bouncing too much in the saddle. I used to think this was mostly due to my saddle being too low, so fettling with that means I have it at the optimal height now, but it still didn’t eliminate all the bouncing, particularly when my cadence was nearing 140rpm or higher.
Two ways around this: either refrain from allowing yourself to pedal at such a pace by feathering the front brake when going down hills – or, bite the bullet and begin learning how to pedal fast without so much bouncing. Having been a chicken and tried the former, I stumbled on a solution to the latter as I experimented with a smaller sprocket on the back than I use normally – giving me a higher gear ratio and requiring more power to get to a high rpm.
Fiddling with this I discovered that I wasn’t able to smoothly reach the higher rpm I was used to with my ‘normal’ pedalling technique (or I could, but it knackered me out sooner). I had to start both pushing the pedal down, as well as pulling it up. Using the higher gear made me pay more attention to the full revolution of the pedal and be able to do the motion properly, something people either describe as ’scraping’ the ground as if you were a bull waiting to charge, or playing the cartoony roadrunner bird. I’ve tried this before on the roadbike, but somehow because there is less ‘immediacy’ about the revolution as you can always coast, I found I hadn’t really internalised this motion the way I could do now on the fixie.
In the process of practicing the ’scraping’ I also discovered that I have a significant muscle imbalance, with my top thigh muscles, being far stronger than the thigh muscles behind. This is probably only natural and is easy to aggravate when cycling when going up hills as one is more inclined to push the pedals down than pull them up. Interestingly, I have also recently had some knee aches and pains, which I worried would be aggravated by using a higher gear on the fixie. No such trouble though, as long as I scrape with the pedals, as opposed to drift back into my old style. The breakthrough though was the insight that if I use the ’scraping’ technique when accelerating my rpm and when going at a really high rpm, I somehow become glued to the saddle and stop my former bouncing around. For the first time ever I was feeling like Mark Cavendish when going down a really big hill and nearing 160rpm.
Yesterday I was also out on the road-bike to do some more cadence training and was feeling a little silly going around the park concentrating intensely on sustaining over 90 rpm cadence in the gale force wind. I ended up on the small chainring most of the time, but felt the lessons were begin to sink in. The trick is to pedal properly without having to think about it. Am some time off from that yet, but concentrating on this as an area to improve on definitely is paying off. Moreover, both going up and down hills is going better these days..






