<Originals>Muscle Damage and Soreness Following Repeated Bouts of Consecutive Drop Jumps

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概要

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• MIYAMA, M. and NOSAKA, K., Muscle Damage and Soreness Following Repeated Bouts of Consecutive Drop Jumps. Abv. Exerc. Sports Physiol., Vol.10, No.3 pp.63-69, 2004. This study investigated the magnitude of muscle damage and soreness induced by consecutive drop jumps (DJ), and whether changes in indicators of muscle damage attenuate when the same DJ exercise is repeated 8 weeks after the first exercise bout. Eight subjects performed two bouts of DJ exercise scpatated by 8 weeks. Subjects preformed five sets of 20 DJ from a height of 0.6 m box with a 10-s intcrval between jumps, and 2-min rest period between sets. Jump height during DJ, peak vertical ground reaction force (peal VGRF), and ground contact time were determined from the force platform data for each DJ. Heart rate was also measured during exercise. Maximal isometric force (MIF), muscle soreness (SOR), pasma creatine kinase (CK) activity, and vertical jump performance were measured before and immediately after, and 1, 24, and 48 hours after the DJ exercise, and blood lactate concentration was measured before and immediately after the exercise. All indicators of muscle damage changed significantly (P<0.05) after both bouts, whereas no significant differences between bouts were evident for jumping height during DJ, peak VGRF,, ground contact time, heart rate, and bolld lactate concentration. Compared to the first bout, all indicators of muscle damage resulted in significantly (P<0.05) smaller changers after the second exercise bout. The maximal decline in MIF from pre-exercise value for bout 1 and 2 were 39.6% and 29.2%, respectively. SOR peaked 24-48 h after exercise for bothe bouts, but SOR after bout 2 was significantly (P<0.05) lower than that after bout 1. Peak CK activity was 910 IU･L-1 after the first bout, but 391 IU･L-1 agter the second bout, which was significantly (P<0.05) lower than after the first bout. It was concluded that a consecutive DJ exercise induced severe muscle damage, and adaptation resulting in attenuated responses of MIF, SOR, plasma CK activity, and vertical jump performance lasted for 8 weeks.

• 日本運動生理学会の論文

著者

• Nosaka Kazunori

  School Of Biomedical And Sports Science Edith Cowan University

• MIYAMA Motoyoshi

  Faculty of Management and Information Science, Josai International University

• Miyama Motoyoshi

  Faculty Of Management And Information Science Josai International University

関連論文

• Muscle Damage and Soreness Following Repeated Bouts of Consecutive Drop Jumps
• S-4 Exercise-induced muscle damage and amino acids(The Proceeding of the 14th Annual Meeting of Japan Society of Exercise and Sports Physiology July 29-30, (Hiroshima))
• Recent development of research in exercise-induced muscle damage and plasticity of skeletal muscle

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