When climbing a mountain, the quadriceps femoris will be in two states respectively. When going up the mountain, it tends to shrink naturally, and when going down the mountain, it tends to shrink unnaturally. People with muscle deficiency will cause muscle cell damage if they do unnatural contraction.
Therefore, it will cause people with weak feet, the strength of leg muscles will be reduced, and the reduction of muscle strength will highlight the inflexibility of feet supporting the body. This is the reason why my legs often tremble, my knees tremble and my feet don't work hard when I go down the mountain.
Extended data:
1, the most important one: don't run down the hill, don't jump, slow down carefully. Rushing down the mountain is the most fatal to the knee, and most disabled donkeys are because of this. The correct way to go downhill is to put the center of gravity back, slightly lower, move the center of gravity before the front foot stands (instead of hitting it down), and always have one foot on the ground.
2. Minimize the load. Do what you can before you leave. Even if climbing a mountain, it is normal to walk upright for more than 4 hours. In general, if the load exceeds 1/4 of the body weight, it is necessary to control the rhythm from the perspective of protecting the knees when going down the mountain. Even under special circumstances, the load should not exceed 1/3 of the body weight.
3. Be fully prepared before climbing the mountain, including stretching, so that joints, muscles and ligaments can be well warmed up. You can also rub the lower edge of your knee with your fingers to promote the secretion of joint lubrication at night.