Table 1. Important calculations for the energy values of gastrocnemius lateralis (GL) in the mid-low frequency band (d3), as well as rectus femoris (RF) in the high frequency band (d1), are presented for different groups at various knee starting angles (mean ± SD) (n = 13).
Parameter Condition Knee starting angle (deg)
60° 90° 120° ANOVA results (A)
GL-d3
energy values
CG 0.98 ± 0.46 0.73 ± 0.68[0.43] 0.46 ± 0.59[0.98] F = 5.29
P = 0.024
SDG 0.96 ± 0.59 0.54 ± 0.58[0.72] 0.47 ± 0.6[0.82]
StSG 0.78 ± 0.58 0.62 ± 0.52[0.29] 0.47 ± 0.58[0.53]
RF-d1
energy values
CG -0.17 ± 0.47 -0.15 ± 0.53* [0.04] -0.57 ± 0.34* [0.98] F = 6.99
P = 0.009
SDG -0.18 ± 0.51 -0.26 ± 0.55[0.16] -0.4 ± 0.38[0.48]
StSG -0.06 ± 0.44 0.00 ± 0.49[0.12] -0.26 ± 0.49[0.43]
The effect sizes of 90° and 120° relative to 60° are reported in square brackets. The two-way ANOVA results (A: angle effects, P- and F- value) are shown in the right column. ANOVA, analysis of variance; CG, Control Group; StSG, Static Stretching Group; SDG, Static Stretching and Drop Jump Combined Group.*: A significantly (P < 0.05) different from the 60°