Any exercise puts pressure on the knees, but it is generally within the limits of what can be tolerated.
Exercise bike with a screen basically does not hurt the knees, because you are pedalling in the process, the knee is completely without pressure, even if you are standing and pedalling, circular trajectory of the knee has no point of gravity, not to mention sitting, so how can we talk about hurting the knees,. As long as you step on the correct posture, don't be too high frequency, pay attention to good movement relaxation words, that dynamic cycling basic can say is not hurt the knee.
Most of the cycling home machine hurt knee reason is the improper use of the problem, in this regard, I give you the following suggestions:
According to the body type to adjust the bicycle seat seat height is too high or too low will affect the effect and safety of riding, so before pedalling need to be as far as possible will be adjusted to the appropriate height of the dynamic bicycle: first of all, stand beside the car, will be adjusted to the seat and the height of the hip the same. Then sit on the seat, put one foot on the pedal, adjust the seat to the position of a slight bend in the knee, the emphasis is on the pedal in the lowest position when the knee can not be completely straight, this point should be borne in mind. After adjusting the seat, you can also ride for a while and fine-tune it according to your feeling.
In addition to the seat, you should also adjust the height of the handlebar, which is about one fist higher than the seat, so that you will naturally bend your hips in the process of riding, so that your hips can participate in more power, and enhance the effect of exercise. You can also ride in a standing position, so that the glutes and core strength will be more pronounced, but also much more tired than the seated pedal is, of course, the workout will be better. When pedalling, remember not to stretch your feet too straight to avoid excessive knee compensation, and not too bent to cause excessive pressure on the knee, probably the best angle of slightly bent knees. Do not be too stiff during the process of pedalling, appropriate relaxation, maintain an even breathing helps to reduce the pressure of riding, seated position with standing position riding can ensure that the effect of exercise at the same time will not be so fatigue, newcomers are recommended to start from the seated position to practice.
Control the exercise time and frequency of each dynamic cycling exercise time I think 40-60 minutes is more appropriate, because most of the aerobic pre-drop is just glycogen in your body, the later, the more fat burning, so the time is a little longer to consume will be better. Riding frequency can be flexibly adjusted according to their own situation, not every day for strenuous riding on the OK, 3-5 times a week can basically adapt to the use of most of the crowd's needs. OK, as long as you can do the above three points, then I believe that stepping on the spinning indoor cycling bike will never cause damage to your knees, and the next thing no matter whether it reduces fat shape, or daily exercise, you just have to stick with it, then you will have to do it. Daily exercise, you just need to stick to it will be able to transform into a different yourself.