A study published in the British Journal of sports medicine, which analyzed 1702 residents aged 51 to 75, showed that if the middle-aged and old people could not stand on one leg for 10 seconds, the risk of death would nearly double in the following 10 years. A person's balance ability, which is different from physical strength, muscle strength and flexibility, can usually be maintained until the age of 60, and then will be relatively rapidly weakened. Research shows that about one-fifth of people cannot stand on one leg for 10 seconds. The older the age, the higher the proportion of not completing. This situation is nearly 5% in people aged 51 to 55, 8% in people aged 56 to 60, about 18% in people aged 61 to 65, about 37% in people aged 66 to 70, and 54% in people aged 71 to 75. In other words, half of the elderly aged 71 to 75 can not stand on one leg for 10 seconds. During an average follow-up of 7 years, 7% of the patients died, of which 32% died of cancer, 30% died of cardiovascular diseases, 9% died of respiratory diseases, and 7% died of COVID-19. Compared with those who could not stand on one leg for 10 seconds seven years ago, the mortality rate was significantly higher (17.5% vs 4.5%). Inability to stand on one leg for 10 seconds increases the risk of death by 84% in the next 10 years. In addition, the proportion of obesity, hypertension, dyslipidemia, cardiovascular disease and diabetes is higher among those who can not stand on one leg for 10 seconds, especially the prevalence of diabetes is 3 times higher than those who can stand on one leg. The researchers believe that the single leg standing for 10 seconds test helps to provide fast and objective feedback of static balance, and increases useful information about the risk of death in the middle-aged and elderly. (outlook new era)