Reproducibility and validity of the quadriceps muscle integrated electromyogram threshold during incremental cycle ergometry.

摘要: The principle aims of this research were, firstly, to determine if the relationship between integrated electromyography (iEMG) and exercise intensity was linear or threshold-like, secondly, iEMG repeatable on different test occasions. A group 20 trained male subjects participated in study. Each subject completed two incremental tests a Monark cycle ergometer. were identical separated from each other by mean period 42 (SD 12) h. EMG signals recorded vastus lateralis, rectus femoris medialis muscles at using surface electrodes. shown be (r = 0.95 r 0.98) with no obvious thresholds present. gradients simple regression lines fitted compared not significantly retest occasion (CV 9%-12%). In summary, findings study indicated that, during exercise, quadriceps musculature threshold-like. Furthermore, workload