A driver who wants to succeed not only has to make his cycling attitude very aerodynamic, but also increases the crush efficiency. In addition, tread symmetry is also important for drivers to pay attention to. The symmetry of trample can affect our cycling efficiency, and may affect our health.

　　Cycling is not a very demanding sport for technology, but it doesn't mean it doesn't matter.

　　Mastering the correct gear ratio, maintaining an efficient trample rhythm, and reducing the physical consumption of the bike is the basic skill that all drivers who expect to ride farther and faster will have to master. If you want to get good results in a time trial, you need to learn how to make your posture more aerodynamic and minimize the resistance to progress. Anyway, while all the above is important, there are some details that we can't ignore, which is the stamp itself.

　　In the nature of the trample, the perfect stamp is the circle. Your feet through the combination of lock step and lock shoes, so your muscles and joints of trajectory was cushion height, the position of the hip, and is determined by the location of the foot, as long as you are on both sides of the crank is long, you trample dynamic is symmetric.

　　But if you look at every stampede from a biomechanical point of view, it's not as good as you might think. Everyone's pedals on a bicycle are not necessarily perfectly symmetrical. Simply put, your left leg may be more powerful than your right leg. This will lead to two results: you may get tired too early in a long ride (you can actually ride farther! Second, different stampedes can cause your body to lose balance and lead to higher risk of injury.

　　How unbalanced is it?

　　The power difference between the left leg and the right leg can be very large in a special study. In one set of data, six heavily trained male athletes used the SRM power meter to simulate 40 kilometers of time trials, testing the power of their left and right legs. The results showed that the hair force on both sides was unbalanced, with the average difference between 13% and 17%.

　　In the final stage of the simulation, all the drivers have improved the frequency, and the difference between the left and right foot has decreased. However, the dominant position of each driver is still dominant.

　　Imbalance can lead to overuse and increase the risk of injury.

　　In another study of trampoline asymmetry, scientists conducted a biomechanical study of 11 professional cyclists who regularly practiced long and long distance cycling. These athletes with an average age of 53, with rich experience in cycling (distance between 4500 km to 14000 km), all think oneself has the very good riding skills, in addition, before the study they have persistent pain or realize they may be trample frontal asymmetry in biomechanics.

　　The drivers performed 18 minutes of cycling tests on a vehicle equipped with SRM power meters, while the TACX power meter was used and adjusted to the optimum geometry according to the rider's body. In the test, the trample force applied on the left and right crank of each tester can be recorded on the corresponding power output data. This gives you a sense of the trample that each tester exerts on each of the steps.

　　To improve the significance of stamp symmetry.

　　Stamp on the disadvantages of asymmetry, despite the increased risk of injury, imbalance of power between left and right leg can cause the body to feel tired prematurely, with big legs through greater power to make up for the power of small legs to keep the power output is a way of low efficiency. Given the results, it is significant that the condition of the driver to detect his trample biomechanics, improve the efficiency of the stampedes and reduce the chance of injury.

　　How to check the symmetry of leg strength?

　　Don't think oneself "feel" is symmetrical is power balance, feel no commonly, you need a precise measurement, look at the data to analyze their own about the output power is balanced and smooth enough, this to use accurate, with about output test power meter, such as SRM for precise measurement.

　　How to improve the symmetry of the legs?

　　If your left leg appear very obvious asymmetry trample output, then you need a special strength training in view of the weak side to improve your stamp on symmetry, so as to improve the efficiency of trampling. Lunges and lunges are very good methods. Through certain training, gradually reduce the output force difference of the legs, can improve the bilateral output symmetry.

　　Of course on the cycling use power meter for stamping on both sides of the balance of power in the training (need power meter to test two legs, output torque) is also a good way, your goal is to try to trample feet minimize the output power of differences. This, like strength training, can effectively improve your stampede.

　　case

　　In November 2007, Matt Brammeier's career had to be suspended after he was hit by a cement mixer, causing femur fractures and tibia.

　　But through a long recovery, Brammeier returned to the game and returned to his beloved bike. But then another problem came up, and his right side was bigger than the left. Its left lumbar muscle group is very weak - this is a significant role for stability in cycling. It made his ride difficult.

　　Brammeier with resistance to bring some specially designed small training to re-activate your waist, it even use special tooth plate with on-off device for training, this can let him use to power the right muscle groups. It was this kind of training that allowed him to rebuild the right riding skills.

　　Brammeier still had an imbalance in leg power. He continued to train his left leg alone for three months. The daily core training and cycling training is very difficult, but in order to solve this problem, he still insists on training, and continues to maintain the training of the waist.

　　God helps those who help themselves. Brammeier now is still a professional driver, his courage, endurance, perseverance, and his love of bicycles that helped him through the life long and frustrating period, scientific training to let him back on the bike, but now he has won five Irish national champion.