With improved a five-day intensive, low-resistance elastic band exercise program to evaluate its effectiveness in improving total muscle mass, upper and lower extremity muscle strength, self-perceived fear of falling, and depression among hospitalized elderly individuals. This study is a random control trial. Data collection includes elderly patient's total muscle mass, upper and lower extremity muscle strength, self-perceived fear of falling, and depression among hospitalized. The total muscle mass and upper and lower extremity muscle strength will be calculated in kilograms.

Investigators have designed a five-day intensive, low-resistance elastic band exercise program to evaluate its effectiveness in improving total muscle mass, upper and lower extremity muscle strength, self-perceived fear of falling, and depression among hospitalized elderly individuals.

Investigators will enroll individuals aged 65 hospitalized elderly. participants will be randomly assigned to either the experimental or control group. The experimental group will undergo a five-day resistance exercise program using elastic bands, with two 20-minute sessions per day (totaling 200 minutes). The program aims to improve muscle mass and strength. Non-invasive instruments will be used to measure muscle mass and strength, and participants will complete self-report questionnaires on fear of fall and geriatric depression.

Inclusion Criteria:

1. Age of 65 years or older.
2. Anticipated hospital stay exceeding 7 days.
3. Able to follow instructions.
4. Four-limb muscle strength of at least three points, and grip strength measurements with a minimum of 26 kilograms for males and 18 kilograms for females.

Exclusion Criteria:

1. This includes individuals with cardiovascular diseases such as acute myocardial infarction, unstable angina, poorly controlled arrhythmias, complete atrioventricular block, acute heart failure, acute myocarditis, acute pericarditis, and other cardiac conditions.
2. Poorly controlled hypertension, with systolic blood pressure less than 90 mmHg or greater than 200 mmHg under medication.
3. Individuals hospitalized due to acute neurological injuries or conditions, such as epilepsy, stroke, or Parkinson's disease.
4. Diagnosed with cognitive impairment or Alzheimer's disease.
5. Those who require long-term ventilator support and are unable to participate in the program.
6. Individuals with impaired consciousness who cannot cooperate.
7. A Glasgow Coma Scale score of less than 12, or inability to correctly answer questions about person, time, place, or follow instructions.