Effects of Passive Warm-Up With Ultrasound Diathermy on Exercise Performance and Muscle Damage

Abstract

PURPOSE: This study investigated the effects of passive warm-up with ultrasound diathermy and heat packing on exercise performance and recovery on muscle damage. METHODS: Eighteen females (22.16±0.84yrs) participated in this study. All of them were involved into three groups as control group (CON), heat packing group (HP) and ultrasound group (USD). CON never received any warm-up protocol before eccentric exercise, HP received 15 minutes of superficial heat with electrical heat pack before exercise, and USD received 7 minutes of deep heat with ultrasound diathermy before exercise. Each subject processed 30 repeated bouts of eccentric exercise with 80% maximal voluntary isometric contraction force (MVC) level. Serum creatine kinase muscle isoform (CK-MM), MVC, range of motion (ROM) and cross section area of biceps brachii (CSA) were measured before, immediately after exercise and at 2nd, 4th, 7th, and 10th days post-exercise. RESULTS: When measuring serum CK-MM and CSA, there were no significant difference between CON, HP and USD (P > 0.05). When measuring ROM and MVC, there were significant difference between CON, HP and USD (p < 0.05).FigureCONCLUSION: Passive warm-up with ultrasound diathermy and heat packing have better performance in muscle strength and range of motion in eccentric exercise. According to the recovery procedure, Subjects of USD group took lesser damage on muscles than HP and CON. USD group had lesser swelling then other groups in recovery stage after eccentric contraction exercise.