Have you finished with this machine?

2. Do 8 to 12 times in each group, and 4 to 5 groups are almost the same.

Do it 8 to 12 times in each group, about 4 to 5 times.

3. Feel the contraction and relaxation of muscles.

Relax your muscles when you feel contraction.

4. Don't shake your body, just move your arm muscles.

Don't move your body, just your muscles.