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- W2019938180 abstract "The purpose of this study was to examine the effect of isometric strength training on electromechanical delay. Seventeen adult females were randomly assigned into a training (TRN, n = 10) or control (CTL, n = 7) group. The training group performed isometric training of the non-dominant forearm flexors on a Cybex II Dynamometer at a joint angle such that the Cybex lever arm was positioned 60° above the horizontal plane. The training consisted of 3 to 5 sets of eight, 6-second repetitions at 80% of maximal voluntary contraction three times per week for eight weeks. Electromyographic (EMG) and mechanomyographic (MMG) signals were recorded from the mid-portion of the biceps brachii using a bipolar surface electrode arrangement and a piezoelectric contact sensor, respectively. For each subject, maximal isometric TQ and the time delays between the onset of the EMG signal and torque (TQ) production (EMG-TQ), the onset of the MMG signal and TQ production (MMG-TQ), and the EMG and MMG signals (EMG-MMG) were measured at week 0 (prior to the start of training for the TRN group) and at week 8. The isometric TQ and time delay data were analyzed using separate three-way mixed factorial ANOVAs for group by week by TQ and group by week by delay, respectively. The results indicated that there was no change in isometric TQ production across the eight-week time period in the CTL group. For the TRN group, however, there was a significant (p < 0.05) increase in TQ production (22.5%) following the eight-week strength training program. The three-way interaction for the time delay data was not significant (p > 0.05) and the only significant two-way interaction was for delay by group collapsed across week. Thus, the increase in isometric TQ production found in the TRN group following the eight-week strength training program was not associated with changes in the time delay separating the onset of the electrical and mechanical events (EMG-MMG) which occur prior to TQ production or the onset of the these events from TQ production (EMG-TQ and MMG-TQ). This investigation was funded by the NSCA Student Research Grant Program." @default.
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- W2019938180 date "2001-05-01" @default.
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- W2019938180 title "THE EFFECT OF ISOMETRIC STRENGTH TRAINING ON ELECTROMECHANICAL DELAY" @default.
- W2019938180 doi "https://doi.org/10.1097/00005768-200105001-01670" @default.
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