![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
A driver who wants to succeed should not only make his riding posture very aerodynamic, but also increase stamping efficiency. In addition, pedaling symmetry is also a driver's attention, and the symmetry of pedaling will not only affect our riding efficiency, but also affect our physical health.
Cycling is not a technically demanding exercise, but it does not mean that riding technology is not important
Mastering the correct tooth ratio, maintaining an efficient pedaling rhythm, and reducing the physical exertion of riding are basic skills that all riders who wish to ride farther and faster must master. If you want to achieve good results in time trials, you must learn how to make your posture more aerodynamic and minimize resistance to progress. Anyway, although all of the above are important, there are some details that we cannot ignore, that is stamping itself.
In terms of the nature of the stamping action, the perfect stamping is to draw a circle. Your foot is combined with locking and locking shoes. Then the trajectory of your muscles and joints is determined by the height of the seat cushion, the position of the hip joint and the position of the foot. As long as your crank is equal on both sides, then Your stampede movement is symmetrical.
However, if you step on each pedal from a biomechanical point of view, the facts are not as good as you think. The treading action of each person on the bike is not necessarily completely symmetric. Simply put, your left leg may use more force than your right leg. This will lead to two outcomes: You may experience premature fatigue in long distance riding (in fact, you can ride further! JAY Note), and secondly, different pedaling power outputs will make your body lose its balance. , bringing a higher chance of injury.
How unbalanced is it?
The difference in force between the left leg and the right leg in the stampede study can be very large. In a set of research data, six rigorously trained male athletes used the SRM power meter model to simulate a 40-kilometer time trial to test the pedaling force of their left and right legs. The experimental results show that the left and right sides of the hair force are uneven and the average difference is between 13% and 17%.
In the final stages of the simulation time trial, all riders increased their cadences. At this time, the differences between the left and right feet have been reduced. However, the usual foot of each driver still occupies a dominant position.
Unbalanced power can lead to overuse and increase the chance of injury
In another study of treading asymmetry, scientists stepped through 11 biomechanical studies on 11 professional riders who used to train for long periods and long distances. These players, with an average age of 53 years and rich cycling experience (running distances ranging from 4500 km to 14000 km per year), all consider themselves to have very good riding skills. In addition, they have no continuity before participating in the study. The pain or awareness that they may have trampled biomechanical asymmetry.
These riders performed 18-minute cycling tests on a vehicle equipped with an SRM power meter. At the same time, they used a TACX power meter rider and adjusted to the optimum geometry according to the driver's body. In the test, the pedaling force exerted on the left and right cranks of each tester can be recorded corresponding to the power output data. In this way, the pedaling force exerted by each tester during each step of the pedaling can be known.
The significance of stepping symmetry
The asymmetry of stampeding aside, put aside the risk of increased injury, not to mention that the imbalance between the force exerted on the left and right legs can cause the body to feel tired prematurely, and the more powerful legs make up for the less powerful legs. Maintaining power output is a less efficient way. In view of this result, it is of great significance for conditional riders to detect their own stamping biomechanics, increase pedaling efficiency and reduce the chance of injury.
How to check the symmetry of leg strength
Do not "feel" on your own to think that it is symmetrical, it is thought that it is force balance, the feeling is generally not allowed, you need accurate measurements, take a look at the data to analyze whether your left and right output power is balanced and smooth enough, which is to use precise, Power meters with left and right output tests, such as SRM for accurate measurements.
How to improve the symmetry of the legs
Leg strength training
If your left and right legs have a very pronounced asymmetry tread output, then you need to perform special strength training for the weak side to improve your symmetry of pedaling, thereby improving pedaling efficiency. Steps and bows are good ways. Through a certain amount of training, the difference in the output power of the legs is gradually reduced, and the symmetry of the output on both sides can be increased.
Stepping on balance
Of course it is also a good idea to use a power meter on the rider's platform to perform two-step pedaling power balance training (which requires the power meter to be able to test the output torque of both legs separately). Your pedaling goal is to minimize the difference in output power between the right and left feet. . This, like strength training, can effectively improve your treading imbalance.
This spiral design wind turbine, is vertical axis, we call it X type. It's PMG generator, could star up with low wind speed, and very quiet when running, so you can install it on rooftop, won't make noise to you and your neighbours. The rotor wheel diameter is not very big, so it needs small space when installation. For this X series wind turbines, we could make blade height from 1m to 5m, power from 500W to 10KW according to different blades and generators. But the efficiency of this design is not very high, around 30%~60%.
Wind turbine, vertical wind turbine, Spiral wind generator, PMG alternator
Wuxi Smaraad New Energy Technology Co., Ltd. , https://www.smaraadenergy.com