When going downstairs, the load of lower limbs increases. Repeatedly repeating this action will increase the direct stress on joints such as knees and ankles. In fact, when climbing stairs, articular cartilage and meniscus have objective pressure and wear, but don't give up eating because of choking. Scientific exercise can make your legs and feet more and more active. So, what should we pay attention to when climbing stairs for exercise? Why is it harmful to go upstairs to exercise and go downstairs? Let's look at the details. In fact, the advantages and disadvantages of going up and down stairs are difficult to explain clearly with these eight words.

Going upstairs is fitness? That's not true! It is not uncommon that joint injuries and stagnant water caused by climbing stairs often lead to difficulty in walking. The steeper the stairs, the higher each step, the heavier the weight and the greater the force borne by the legs. If you go upstairs quickly, at a speed of 2 steps per second, or at a speed of 2-3 steps per step, your heart rate will soon reach more than 1 40-150 beats per minute. This strength not only exceeds the heart, but also damages the knee. It's best to go upstairs slowly: it's best to climb a floor in 25 seconds. After climbing one floor, stop for several times, and then climb more than ten floors continuously, with heart rate 120- 130 times/min. This speed has a good exercise effect on the heart and front thigh muscles.

Go downstairs to exercise the lower limb back muscles. Compared with going upstairs without overcoming its own gravity, it is much less irritating to the heart. Anyone who has climbed Huangshan Mountain knows that the muscles in front of the thighs will hurt the next day after going up the mountain, and the legs will hurt the next day after going down the mountain. It is a good way to exercise the muscles and ligaments of the whole body to keep the center of gravity (beware of falling).

Going upstairs and climbing stairs is equivalent to doing aerobic exercise, which can exercise cardiopulmonary function and leg muscles, and can play a certain exercise role. But when going downstairs, the knee joint and ankle joint should bear the weight of the whole body. If this operation is repeated, the range of motion of these joints will be artificially increased. The pressure intensity will increase sharply, and the possibility of joint wear will increase, which is harmful to the body.