Abstract
We gave the muscle hot and ice stimulations, which have been used as a means of physical therapy, and analyzed the variety of muscle action using IEMG (integrated electro myography).
Subjects were eleven healthy men (18-29 years old). The muscles measured were their rt-biceps brachii. Subjects practiced isometric contraction (elbow joint flexed 90 degree), then weighted 5-kg on the wrist joint. First, we measured IEMG for 5 seconds without stimulation, secondly with hot stimulation (a skin temperature 40℃-10 min), and with ice stimulation (a skin temperature 20℃-5 min).
IEMG at the ice stimulation was 82-201% of that without stimulation, of 8 subjects showing an increase. IEMG at the hot stimulation was 62-92% of that without stimulation of 9 subjects showing a decrease.
These results suggest that hot and ice stimulations produce contrastive muscle activity.
