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Analysis of the aerobic-anaerobic transition in elite cyclists during incremental exercise with the use of electromyography

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dc.contributor.author Lucía Mulas, Alejandro
dc.contributor.author Sánchez, Oscar
dc.contributor.author Carvajal, Alfredo
dc.contributor.author Chicharro, José L.
dc.date.accessioned 2016-11-26T15:49:09Z
dc.date.available 2016-11-26T15:49:09Z
dc.date.issued 1999
dc.identifier.citation Lucía, A., Sánchez, O., Carvajal, A., y Chicharro, J. L. (1999). Analysis of the aerobic-anaerobic transition in elite cyclists during incremental exercise with the use of electromyography. British journal of sports medicine, 33(3), 178-185. spa
dc.identifier.issn 03063674
dc.identifier.issn 14730480
dc.identifier.uri http://hdl.handle.net/11268/6007
dc.description.abstract To investigate the validity and reliability of surface electromyography (EMG) as a new non-invasive determinant of the metabolic response to incremental exercise in elite cyclists. The relation between EMG activity and other more conventional methods for analysing the aerobic-anaerobic transition such as blood lactate measurements (lactate threshold (LT) and onset of blood lactate accumulation (OBLA)) and ventilatory parameters (ventilatory thresholds 1 and 2 (VT1 and VT2)) was studied.Twenty eight elite road cyclists (age 24 (4) years; VO2MAX 69.9 (6.4) ml/kg/min; values mean (SD)) were selected as subjects. Each of them performed a ramp protocol (starting at 0 W, with increases of 5 W every 12 seconds) on a cycle ergometer (validity study). In addition, 15 of them performed the same test twice (reliability study). During the tests, data on gas exchange and blood lactate levels were collected to determine VT1, VT2, LT, and OBLA. The root mean squares of EMG signals (rms-EMG) were recorded from both the vastus lateralis and the rectus femoris at each intensity using surface electrodes. Results - A two threshold response was detected in the rms-EMG recordings from both muscles in 90% of subjects, with two breakpoints, EMG(T1) and EMG(T2), at around 60-70% and 80-90% of VO2MAX respectively. The results of the reliability study showed no significant differences (p > 0.05) between mean values of EMG(T1) and EMG(T2) obtained in both tests. Furthermore, no significant differences (p > 0.05) existed between mean values of EMG(T1), in the vastus lateralis and rectus femoris, and VT1 and LT (62.8 (14.5) and 69.0 (6.2) and 64.6 (6.4) and 68.7 (8.2)% of VO2MAX respectively), or between mean values of EMG(T2), in the vastus lateralis and rectus femoris, and VT2 and OBLA (86.9 (9.0) and 88.0 (6.2) and 84.6 (6.5) and 87.7 (6.4)% of VO2MAX respectively). Rms-EMG may be a useful complementary non-invasive method for analysing the aerobic-anaerobic transition (ventilatory and lactate thresholds) in elite cyclists. spa
dc.description.sponsorship SIN FINANCIACIÓN spa
dc.language.iso eng spa
dc.subject.other Condición física spa
dc.title Analysis of the aerobic-anaerobic transition in elite cyclists during incremental exercise with the use of electromyography spa
dc.type article spa
dc.description.impact 0.943 JCR (1999) Q2, 21/60 Sport Sciences spa
dc.identifier.doi 10.1136/bjsm.33.3.178
dc.rights.accessRights openAccess spa
dc.subject.uem Electromiografía spa
dc.subject.uem Medicina deportiva spa
dc.subject.uem Ciclismo spa
dc.subject.unesco Medicina deportiva spa
dc.subject.unesco Atleta spa
dc.description.filiation UEM spa
dc.peerreviewed Si spa


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