Stretching and twisting muscles are signs of involuntary muscle contractions. These brutal and painful contractions often occur during a rest. Especially during the night or after a physical activity. These muscular contractions are caused by an imbalance of trace elements, vitamins and minerals in the body. Granions Muscle Relaxant 30 Phials allows a good muscular action during the night, during the pregnancy, by athletes, teenagers and old people.