caa a22 4500 467941009 CHVBK 20180406153012.0 cr unu---uuuuu 170328e20060201xx s 000 0 eng 10.1007/s00421-005-0069-5 doi (NATIONALLICENCE)springer-10.1007/s00421-005-0069-5 Changes in fluctuation of isometric force following eccentric and concentric exercise of the elbow flexors [Elektronische Daten] [Andrew Lavender, Kazunori Nosaka] This study tested the hypothesis that eccentric exercise (ECC) would increase force fluctuation for several days following exercise; however, concentric exercise (CON) would not produce such an effect. Twelve men performed six sets of five reps of dumbbell exercise of the elbow flexors eccentrically with one arm and concentrically with the other, separated by 4-6weeks, using a dumbbell set at 50% of maximal voluntary isometric contraction (MVC) measured at 90° of elbow flexion. MVC, range of motion (ROM), upper arm circumference, plasma creatine kinase activity (CK), myoglobin concentration (Mb) and muscle soreness were assessed before, immediately after, 1h and 1-5days following both exercise bouts. Force fluctuations during 30, 50 and 80% MVC were quantified by coefficient of variation (CV) of the force data (sampling frequency: 100Hz) for 4s. Significantly (P<0.01) larger changes in MVC, ROM, and upper arm circumference were evident following ECC compared to CON, and only ECC resulted in significant (P<0.01) increases in CK and Mb, and development of muscle soreness. Significant (P<0.01) differences existed between ECC and CON for changes in force fluctuations. CV increased significantly (P<0.01) immediately and 1h after ECC from baseline for 30, 50, and 80% MVC without a significant difference among the intensities, and no significant changes in CV were evident following CON. It was concluded that increases in force fluctuation were peculiar to ECC, but did not necessarily reflect muscle damage. Springer-Verlag, 2005 Force fluctuation nationallicence Muscle damage nationallicence Creatine kinase nationallicence Myoglobin nationallicence Muscle soreness nationallicence Lavender Andrew Exercise and Sports Science, Graduate School of Integrated Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, 236-0027, Yokohama, Japan aut Nosaka Kazunori School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Western Australia, Australia aut European Journal of Applied Physiology Springer-Verlag 96/3(2006-02-01), 235-240 1439-6319 96:3<235 2006 96 421 https://doi.org/10.1007/s00421-005-0069-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-005-0069-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lavender Andrew Exercise and Sports Science, Graduate School of Integrated Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, 236-0027, Yokohama, Japan aut NATIONALLICENCE 700 1- Nosaka Kazunori School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Western Australia, Australia aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 96/3(2006-02-01), 235-240 1439-6319 96:3<235 2006 96 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer