05 BMI: Body mass index Table 2: Comparison of HGS, time to fatigue and IEMG
Study characteristics Mixed vegetarians HGS (MVC in N) 367.
Then, two different analyses were performed via the iEMG
data: (1) the fatigue analysis for each exercise set, for both conditions, where the iEMG
was compared between the first and the last repetition for all muscles independently; (2) iEMG
analysis from the first three repetitions for each condition and muscle ([iEMG
The group's data indicated a greater increase in RF IEMG
for the condition with medium-resistance load than that with light- and heavy-resistance load conditions (Figure 9), although the LMM indicated that those differences were not significant (p = 0.
Para el IEMG
el nuevo Factor I contiene los factores I, II y III previos, el Factor II, los IV, V, VI, VII, y VIII.
Repeated-measures analyses of variance were performed to evaluate the influence of fatigue on the MPF, preparatory IEMG
, response amplitude, response latency, lumbar lordosis angle, and trunk deflection following sudden load.
and relative activation time repeatability among starting trials was tested for each upper and lower limb muscle in each start phase and in both start variants by calculating the intraclass correlation coefficient (ICC).
Fatigue protocols result in decrease in IEMG
[26,29,30], previous researches have observed that the magnitude and source of such fatigue may vary when different contraction type, intensity, repetition, speed and rest period are manipulated in resistance exercise protocols [29-31].
where i = Muscles 1 through 8, j = Experimental Conditions 1 through 4, k = Trials 1 through 3, NEMG(i,j,k) = the normalized EMG for muscle i in condition j in trial k, IEMG
(i,j,k) = the current integrated EMG value for muscle i in condition j in trial k, REST(i) = the minimum resting IEMG
value for muscle i for relaxed standing, and MAX(i) = the maximum IEMG
value from muscle i during the maximal isometric exertion.
Based on a statistical power analysis derived from the IEMG
data from Marchetti et al.
This 10-sec recording was analyzed for the iEMG
using the MyoResearch XP software (Noraxon Inc.
With respect to the processing of data, it is important to mention not only the use of raw EMG, IEMG
, linear envelope, mean rectified EMG (MREMG), together with the synchronization system and the normalization technique used; such as normalized to maximal voluntary contraction (MVC) or to 50% of the average of three MVCs, or to the highest peak (per movement or per subject) or to the mean of the subject ensemble average.
The dependent measures in this experiment were the normalized IEMG
(NIEMG) values for the seven muscles that were sampled.