balls up แปลว่า
- vt. ทำให้ล้มเหลวเพราะทำพลาดหรือผิดกฎ
ประโยค
Standing against the wall, place the balls between the shoulder blades on both sides of the spine. Bend and flex the knees to roll the balls up and down along the length of the thoracic spine (upper and middle back).