Ice can be combined with movement. Once the fourth stage of icing has been achieved, numbness, gentle range of motion and isometric exercises can begin. These movements should be painless, stressing circular, spiral, and diagonal movements. Once the numbness has worn off, re-ice and exercise again. This can be done two or three times a day.
Ice can cause changes in the collagen fibers of the muscle.
Strenuous exercise is a bad idea during an ice treatment, as this can result in further damage to the injury. In March of 1995, an interesting study was conducted on the use of ice and ultrasound. Ultrasound is an instrument used in assisting the healing process to damaged tissue. The study found if ultrasound was followed by a five-minute application of ice, the muscle significantly increased in size. When ice was applied first followed by ultrasound, there was little or no change in the muscle fibers.