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Thus, the purpose of this study was to evaluate the time course of EMG frequency (MNF and MDF) changes during a 3MT cycling session and to examine which frequency parameter (MNF or MDF) is more suitable for evaluation of changes in neuromuscular function throughout the 3MT.
MNF, MDF and RMS during the 3MT were calculated and expressed every 10 seconds.
In order to further illustrate changes over the course of the 3MT, change scores (A) with 95% confidence intervals for each time period compared to the initial 10s epoch for MNF and MDF or from the previous epoch for RMS and PO were calculated.
01) (as shown in Figure 4) significantly decreased throughout the 3MT, while MDF showed a nonsignificant decline (F = 2.
The results from post-hoc testing showed that MNF during the first two 10-second epochs of the 3MT was 71 [+ or -] 9% and 70 [+ or -] 11% of the mViC value, respectively.
The power output value was decreasing at a very low constant rate after 70 seconds and plateaued during the last 60 seconds during the 3MT (Figure 1), which was similar to that found previously (Vanhatalo et al.
However, MNF may better reflect neuromuscular fatigue during the 3MT than MDF due to the reduced variability of results, which is in accordance with previous findings (Balestra et al.
Given the rapid pedaling rate at the start of the 3MT, type II fibers would be expected to preferentially contribute to power production (Beelen et al.
The results of the current study fall into the second category, which indicates decreased muscle force due to the failure of neural excitation and the gradual reduction of power output during the 3MT.
It was speculated that the vast majority of available motor units would be activated at the beginning of the 3MT, however, the highest normalized RMS achieved at the onset of 3MT was only 55%.
2] Nonstandard abbreviations: MEN2, multiple endocrine neoplasia type 2; VHL, von Hippel-Lindau disease; NF1, neurofibromatosis type 1; SDH, succinate dehydrogenase; MN, metanephrine; NMN, normetanephrine; 3MT, 3-methoxytyramine.
2 patients who presented with pupil size 3mm had post op day 1 vision between 6/60 and counting fingers 3mts (Table 9).
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