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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE
A Journal on Internal Medicine and Pharmacology
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Gazzetta Medica Italiana Archivio per le Scienze Mediche 2009 April;168(2):69-74
Effect of a 15-day cycling tour on electromyographic changes in lower extremity in untrained participants
Chang Y.-W., Chang C.-K., Wu H.-W., Chiu Y.-C.
1 Department of Exercise and Health Science National Taiwan Sport University Taichung, Taiwan
2 Sport Science Research Center National Taiwan Sport University Taichung, Taiwan
3 Department of Sports Medicine China Medical University, Taichung, Taiwan
Aim. This study is important for the understanding of how an increase in training volume for a few days affects neuromuscular command. Changes in electromyography signals after prolonged cycling training in experienced cyclists have been investigated, but the information in untrained participants is still lacking. The purpose of this study was to investigate the effect of a 15-day cycling tour on electromyography signal changes in previously untrained participants.
Methods. Sixteen healthy participants performed a graded maximum exercise test before and after the tour. The surface electromyography signals of eight lower extremity muscles were measured and the median frequency and the root mean square values were analyzed.
Results. Median frequency substantially shifted toward higher spectrum after the tour. The variability and the absolute slope of median frequency and root mean square values were substantially reduced after the tour.
Conclusion. Our findings suggested that a multiday prolonged cycling activity significantly improved the muscle endurance by altering the control strategy of the central nervous system and modifying the force-generating capacity of the skeletal muscle.