老年人由于营养素摄入不足,容易造成营养不良,最明显的表现就是肌肉流失。人体全身大大小小肌肉有639块,这些肌肉的总重量约占体重的50%。全身肌肉的萎缩与流失是逐渐发生的。中年之后,你就会发现大腿变细,腹肌消失,全身肌肉变得很柔软。从四十岁开始,肌肉每年流失0.5%~1%,五十岁以后肌肉丢失加速。与此相对应的,肌力也随年龄增加而明显减退,六十岁时肌力仅为三十岁时的70%。肌 Older adults due to inadequate intake of nutrients, likely to cause malnutrition, the most obvious manifestation of muscle loss. The body has 639 large and small muscles, the total weight of these muscles accounts for about 50% of body weight. Whole body atrophy and loss of muscle is happening. After middle age, you will find thinner thighs, abdominal muscles disappear, the body muscles become very soft. From the age of 40, muscle loss of 0.5% to 1% per year, muscle loss after the age of fifty accelerated. Corresponding to this, muscle strength also significantly decreased with age, muscle strength at 60 years old was only 70% of 30-year-old. muscle