While previous studies have linked mortality and fitness level, Myers said, few have focused on sick patients or compared the impact of fitness levels to other common risk factors for death.

• 迈尔斯指出，以上研究已将死亡率同健康水平联系到一起，但几乎没有什么研究关注于虚弱的患者或将健康水平的影响同其他常见的致命因素进行比较。