In view of the long-term exercise, you can maintain your health and strengthen your physical strength. It can also improve your body's balance and help maintain your body's coordination so that you can reduce the chance of falls.

Therefore, in the face of aging, stroke rehabilitation or balance of power caused by balance of power decline, sports injuries or falls related issues, this study will focus on "balance ability" to explore a range of impacts and relationships.

Considering the standardization comparison in the study, this study will collect data on the balance of young people under different external stimuli, and hope to understand the balance control ability by objectively collecting the physiological signals of the Center of Pressure (COP).

The change, and the use of the Berg scale as a benchmark for the assessment of balance ability, and then return to the issue of balance ability training.

Therefore, this study divides the experiment into two major stages. The first stage will focus on healthy young people, and explore how external stimuli affect balance, and then assist balance ability training to find the most appropriate adjustment of body posture control.

The second phase explores the appropriate exercise training for stroke patients, such as the use of Modular Interactive Tiles System (MITS) training, to track the effectiveness of external stimulus impact balance training.

Inclusion Criteria:

• Stage1 Subjects were included in the condition of adults with good health and no mobility disorder. They will be considered by healthy young people over the age of 20.

It is estimated that 12 males and 12 females will be called.

• Stage2 Forty patients with a stroke of more than six months have been admitted.

Subjects were included as follows:

1. stroke for more than 6 months;
2. current stable condition;
3. able to walk independently for more than 5 meters, and if necessary, use auxiliary equipment;
4. before and after the two feet Stand in a straight line for more than 10 seconds;
5. can understand spoken instructions.

Exclusion Criteria:

• Stage1

  1. unable to stand with the feet and the walker;
  2. pregnant;
  3. within six months will affect the walking or standing surgery (such as limbs, spine or brain surgery);
  4. other Physical and mental state is not suitable.

• Stage2

  1. unable to stand and walk with both feet;
  2. suffering from diabetes or other diseases combined with peripheral neuropathy, causing a poor sense of body or a neurological disease affecting lower limb movement and sensory function;
  3. suffering from hemophilia Patients with diseases, other blood-related diseases or severe peripheral vascular diseases;
  4. those who are pregnant;
  5. those who have been affected by walking or standing within six months (such as limb, spine or brain surgery);
  6. Other physical and mental states are not suitable.