FrankDay said:
What do you use as your metric in which to tell whether a rider has a pedaling issue? In other words, what do you look for?
Will let you know when I see a rider with a pedalling issue.
Could you give a reference to this injury literature?
Asplund, C., & St Pierre, P. (2004). Knee pain and bicycling: Fitting concepts for Clinicians. The Physician and Sportsmedicine, 32, 23-30.
Bailey, M.P., Mailardet, F.J., & Messenger, N. (2003). Kinematics of cycling in relation to anterior knee pain and patella tendinitis. Journal of Sport Sciences, 21, 649-657.
Dannenberg, A.L., Needle, S., Mullady, D., & Kolodner, K.B. (1996). Predictors of injury among 1638 riders in a recreational long-distance bicycle tour: Cycle Across Maryland. The American Journal of Sports Medicine, 24, 747-753.
Dettori, N.J., & Norvell, D.C. (2006). Non-traumatic bicycle injuries: A review of the literature. Sports Medicine, 36, 7-18.
Ericson, M.O., & Nissel, R. (1987). Patellofemoral joint forces during ergometric cycling. Physical Therapy, 67, 1365-1369.
Holmes, J.C., Pruit, A.L., & Whalen, N.J. (1994). Lower extremity overuse in bicycling. Clinics in Sports Medicine, 13, 187-205.
Mellion, M.B. (1991). Common cycling injuries: Management and prevention. Sports Medicine, 11, 52-70
Peveler, W.W., Bishop, P., Smith, J., Richardson, M., & Whitehorn, E. (2005). Comparing methods for setting saddle height in trained cyclists. Journal of Exercise Physiology online, 8, 51-55.
Peveler, W.W., Pounders, J.D., & Bishop, P.A. (2007). Effects of saddle height on anaerobic power production in cycling. Journal of Strength and Conditioning Research, 21, 1023-1027.
Powel, B. (1986). Medical aspects of racing. In E.R. Burke (Ed.), Science of Cycling (pp. 185-201). Champaign, IL: Human Kinetics.
Sanderson, D.J., & Amoroso, A.T. (2009). The influence of seat height on the mechanical function of the triceps surae muscles during steady-rate cycling. Journal of Electromyography and Kinesiology, 19, e465-e471.
Tamborindeguy, A.C., & Rico Bini, R. (2009). Does saddle height affect patellofemoral and tibiofemoral forces during bicycling for rehabilitation? Journal of Bodywork & Movement Therapies, doi: 10.1016/j.jbrnt.2009.07.009
de Vey Mestdagh, K. (1998). Personal perspective: in search of an optimum cycling posture. Applied Ergonomics, 29, 325-334.
Wilber, C.A., Holland, G.J., Madison, R.E., & Hoy, S.F. (1995). An epidemiological analysis of overuse injuries among recreational cyclists. International Journal of Sports Medicine, 16, 201-206.
Exactly what constitutes a "poor seat height" or an "improper cadence"?
For performance it would appear that 109% of leg length and for injury prevention purposes a 25degree bend in the knee but to be honest the research behind these measures is pretty shaky. I prefer to set a rider up on a trainer simply putting the seat up till the rider starts rocking and lowering it down till the rocking stops. Then we go out on the road and I observe them riding uphill under load or on the track using the moto to get them up to speed so I can again see the position under specific loading.
Cadence depends on the rider and the event they are in. As mentioned a single speed rider runs cadences from as low as 20rpm up to 140rpm but most road events run in certain cadence zones and track tend to run at higher levels as that muppet you "claimed" was going to have a go at the hour record on the track at 60rpm found doesn't work all that well in practice.
What is the correct height? What is the scientific evidence that your "correct height" is "THE correct height"?
TBH I think that 25degree knee bend was plucked out of thin air. It appeared in one of Pruitt's articles and has become Gospel from there. More of that repeat the lie stuff I guess hence I don't just settle for video analysis in the lab to set up bikes unless lab based tests are the main goal.
What is your definition of too high or too low? Do you do any testing to determine what the optimum cadence is for any individual? Is there any scientific study that backs up what you do?
I think we have thrashed that sucka out pretty well and the conclusion is that a set cadence is a red herring. Bit like cranks lengths. No meaningful differences till you go stupid long or stupid short. Same for cadence. I tell my trackies that within reason gears on the track is a crapshoot and if they go too big then roll that sucka and if to small then pedal faster.
The only way I know of to rapidly change cadence in a track rider is to change gear size. But, if we bring cadence up by reducing gear size (or down by increasing gear size) we haven't, necessarily, increased power or speed (the two are related on a track bike aren't they?) so who cares if they adapt to the higher cadence easily if they are not also seeing increased speed? What exactly did you mean here?
The issue for us in Christchurch is that our track is outdoors and rather slow so when we head down to Invercargill indoor board track it's not a simple matter of increasing the gear to maintain the cadence (especially for juniors on gear restrictions) otherwise the riders would never get the bike started so they tend to ride at a higher cadence.
Thanks in advance for your complete and forthright answers..
No worries Frank any time I can clear up your many misconceptions only too happy to help. Un-muddy those waters and reverse the lie so to speak
