Riding at the right cadence
Exerts from article written by Torbjorn Sindballe printed online by Triathlete EU
It takes more than just endless hours and countless miles to become a fast cyclist (trust me, I have been at it for 7 years). Like any sport, there are numerous variables and teaching methodologies involved in it. Once such variable is cadence I have tried slow and and fast, Torbjorn Sindballe explores cadence in his article.
He writes; “The debate about choosing the most efficient cadence has been ongoing for many years. Studies in physiology tell us that a lower cadence—about 60 to 70 rpm at moderate workloads—is the most energy efficient, and yet many triathletes race the iron distance with 80 to 90 rpm. Along those same lines, Lance Armstrong’s extremely high cadence—often upward of 110 rpm—baffled the scientific community during his seven straight Tour de France wins.
I believe this inconsistency between science and practice has to do with strength and acceleration. There is a big difference between pedalling on an ergometer in a lab and riding in a peloton on undulating roads, where you need to constantly accelerate or decelerate in response to other riders, the course and the terrain. Acceleration at lower cadences occurs less rapidly and requires far more muscle force than accelerating at a higher cadence. So while a lower cadence of 60 to 70 rpm is more
energy efficient, if you are accelerating at all while you ride—which you almost certainly are— accelerating at a lower cadence also saps the strength you need to run once you get off the bike. To get an idea of the difference between strength fatigue and energy fatigue and why you need to worry about it, imagine going to the gym and doing three sets of 10 squats at your max weight. You aren’t going to use much energy doing this, but you are going to sap your muscle strength and break down muscle fibres, making it very difficult to run well after you’ve finished the workout.
Thus, in triathlon, finding the right cadence is a balance between strength and energy efficiency. You cannot go too low, as it will drain the strength you need to run, and you cannot go too high, as it will deplete your energy stores too fast.”
I have actually found while my coaching team wants me to ride at 90-95 I real better coming off the bike both cardio and leg strength fresher if I red between 80-& 85 but that’s just me. Not surprisingly I spend most of my time training by heart rate zone in the same cadence while sometimes ridding in the 90′s I find I average a better speed with less effort at 85 cadence.
Sindbjorn goes to finish saying “Other factors should also influence your cadence choice. According to a 2009 scientific review by Ernst Hansen and Gerald Smith in the International Journal of Sports Physiology and Performance, cadence has been shown to go up when workload, or power, increases, so you will most likely choose a higher cadence in a short time trial compared to your usual long training ride. Athletes with a high VO2max choose a higher cadence when riding at the same relative intensity as athletes with a lower VO2max, most likely because they push higher watts and thus need to ease the load on the legs. (This phenomenon partly explains why Armstrong chooses a higher cadence than the rest of us—he pushes higher watts.)”
