Sarcopenia is a muscle loss symptom, which seriously affects our normal muscle functions and our daily activities. 

Our muscle mass tends to gradually decrease after we are 30 years old. Muscle loss will be getting more serious for females, or when we are after 50. Elderly, especially those having very minimal activities, are likely having sarcopenia unavoidably. 

Sarcopenia can also cause higher risk of fall and pain at joints. This will also cause further loss of muscle mass due to lower body activities. 

It is a dilemma in real life situation. According to research, in order to achieve hypertrophy, which means increase in muscle mass, we need to perform High Loading Exercise (70%~80% of 1RM) or High Intensity Interval Training (HIIT). However, it is impossible and dangerous for elderly or patients to perform such vigorous exercise. Generally they will receive relatively Lower Intensity Exercises, like pulleys or light weight dumb bells. However, these exercises are impossible to achieve hypertrophy for us.