? From the above stress diagram, we can clearly see that the greater the bending angle of the knee joint, the greater the stress on the patella joint and the greater the damage over time. Therefore, you must not bend your knees when standing on the pile. This is also one of the important figures of Ma Lao Gong Zhuang. However, some students also asked, how to explain the "knee flexion and extension" in the formula of internal strength for health preservation? Is it bent or stretched? In fact, knee flexion and extension refers to the state of knee joint bending slightly, that is, straight or not, bending or not, probably like the angle of daily standing.
? As can be seen from the above figure, when the knee is slightly flexed, the thigh bone and the calf bone are almost in a straight line, thus reaching straightness in flexion, which is also the key link to start the force from the foot. So, how do you find this feeling at a specific station? My personal experience is that you can straighten your legs first (that is, the state of 1 above), and then relax your legs, and you can reach the state of slightly bending your knees.
The above is just my personal experience, and I hope it will be beneficial to everyone.