Table 5 Results of the eccentric IMDF-EMG obtained from 76 healthy individuals that performed the cyclic submaximum lifting task. For these 76 subjects a fitted EMG dataset was available on at least one test day and the mechanical variables of test performance were comparable between age groups. Note that significant changes of the IMDF-SEMG with the duration of the exercise and normalized to the onset are indicated by “*” (Bonferroni corrected sig. Level = p < 0.005); significant group effects are Bonferroni corrected and are given in baldface if p<0.01
n = 156 | Intercept | Slope normalized to intercept | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Level | Mean (SE) | Age F; p | Sex F; p | Age:Sex F; p | tnr F; p | Mean (SE) | Age F; p | Sex F; p | Age:Sex F; p | tnr F; p | |
All | < 50 | 62.36 (1.25) | 1.1; 0.3 | 0.7; 0.4 | 2.8; 0.1 | 0.0; 1.0 | −0.15 (0.02)* | 4.3; 0.043 | 2.5; 0.1 | 0.0; 0.9 | 0.1; 0.9 |
> 50 | 64.41 (1.15) | −0.09 (0.01)* | |||||||||
multifidus (L5) | < 50 | 70.97 (1.85) | 2.2; 0.1 | 0.1; 0.8 | 0.7; 0.4 | 0.1; 0.9 | −0.25 (0.03)* | 11.7; 0.001 | 1.7; 0.2 | 0.4; 0.6 | 0.5; 0.6 |
> 50 | 76.08 (1.68) | −0.11 (0.02)* | |||||||||
longissimus (L2) | < 50 | 61.14 (1.68) | 1.5; 0.2 | 0.1; 0.8 | 3.0; 0.09 | 0.6; 0.5 | −0.13 (0.03)* | 0.4; 0.5 | 2.0; 0.2 | 0.0; 0.9 | 0.1; 0.9 |
> 50 | 63.92 (1.39) | −0.10 (0.02)* | |||||||||
iliocostalis lumborum (L1) | < 50 | 54.97 (1.11) | 0.5; 0.5 | 3.5; 0.06 | 2.3; 0.1 | 0.6; 0.5 | −0.08 (0.02)* | 1.1; 0.3 | 0.3; 0.6 | 0.5; 0.5 | 0.3; 0.8 |
> 50 | 53.22 (1.00) | −0.05 (0.01)* | |||||||||
most negative electrode | < 50 | 47.47 (0.94) | 2.2; 0.1 | 2.6; 0.1 | 2.7; 0.1 | 0.3; 0.8 | −0.37 (0.02)* | 12.8; 0.001 | 7.1; 0.009 | 0.0; 0.9 | 0.6; 0.6 |
> 50 | 49.43 (0.93) | −0.25 (0.02)* | |||||||||
uncomp. Imbalances | < 50 | 10.1 (0.6) | 1.7; 0.2 | 1.5; 0.2 | 0.0; 1.0 | 0.0; 1.0 | |||||
< 50 | 9.0 (0.5) | ||||||||||
comp. Imbalances | < 50 | −1.0 (1.0) | 0.7; 0.4 | 4.3; 0.042 | 0.1; 0.8 | 1.2; 0.3 | |||||
< 50 | −2.7 (0.9) | ||||||||||