Abstract
Warm-up before exercise could increase blood flow of whole body, increase muscles and skin temperature, prevent injury within exercise. Passive warm-up can increase temperature of muscles and skin as active warm-up do, but it won't cause the activity of the muscles. PURPOSE: To determine the effects of two different modalities of passive warm-up on serum CK-MM, maximal isometric voluntary contraction (MVC). METHODS: Twelve volunteers were participated in this study (age:25±4.24 y/o), and were separated into three groups randomly as control group (CON), heat packing group(HPG) and ultrasound group (USG). CON never received any warm-up protocol before eccentric exercise, HPG received 15 minutes of superficial heat with electrical heat pack before exercise, and USG received 7 minutes of deep heat with ultrasound diathermy before exercise. Each subject processed 30 repeated bouts of eccentric exercise with 70% MVC level. Serum CK-MM and MVC were measured before, immediately after exercise and at 2nd, 4th, 7th, and 10th days post-exercise. RESULTS: When measuring serum CK-MM, there were significant increases at 2nd, 4th, 7th days on CON than USG. There were significant increases at 4th, 7th days on CON than HPG. There were significant increases at 4th, 7th, 10th days on HPG than on USD. When measuring MVC, there were significant increases at 2nd, 4th, 7th days on USG than CON, significant increases at 4th, 7th days on USG than HPG, and significant increases at 2nd, 4th days on HPG than on CON. At 10th day, MVC level of three groups are the same. CONCLUSION: According to the recovery procedure, USG took lesser damage on muscles than HPG and CON cause the greatest damage. USG and HPG have better muscle strength and performance than CON.
Published Version
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