Table 1 Mean±SD data of the sEMG (mv) and muscle thickness (mm) and pennation angle (°) during levels of intensity

Vastus lateralis

Average ± SD (mv)

0.003 ± 0.002

0.062 ± 0.028

0.152 ± 0.061

0.266 ± 0.122

0.390 ± 0.151

Average ± SD (°)

15.1 ± 3.81

15.7 ± 3.77

17.6 ± 4.06

18.8 ± 4.52

20.7 ± 4.44

Rectus femoris

Average ± SD (mv)

0.008 ±0.008

0.052 ± 0.020

0.149 ± 0.0658

0.293 ± 0.124

0.431 ± 0.185

Average ± SD (mm)

28.8 ± 3.28

32.2 ± 3.97

33.3 ± 4.21

33.4 ± 4.04

33.9 ± 4.3