Table 2. Important calculations for average power (Pavg), peak power (Ppeak), peak ground reaction force (GRFpeak), center of mass peak velocity (Vpeak), and force-velocity ratio (SFv) are presented for different groups at various knee starting angles (mean ± SD) (n = 13).
Parameter Condition Knee starting angle (deg)
60° 90° 120° Condition
Pavg
(W·kg-1)
CG 12.73 ± 1.33 19.13 ± 5.01 25.21 ± 3.67 CG
SDG 14.21 ± 3.21[0.6] 20.65 ± 4.88[0.31] 25.6 ± 3.68[0.11] SDG
StSG 14.24 ± 3.48[0.57] 18.26 ± 5.78[0.16] 24.89 ± 3.24[0.09] StSG
Ppeak
(W·kg-1)
CG 37.33 ± 5.34 46.38 ± 8.23 53.42 ± 7.05 CG
SDG 39.14 ± 5.97[0.32] 47.76 ± 7.14[0.18] 52.9 ± 6.2[0.08] SDG
StSG 38.36 ± 7.64[0.16] 45.33 ± 8.98[0.12] 53.13 ± 6.39[0.04] StSG
GRFpeak
(N·kg-1)
CG 21.04 ± 1.84 24.38 ± 2.2 30.92 ± 2.81 CG
SDG 21.66 ± 2.15[0.31] 25.17 ± 2.7[0.32] 30.59 ± 2.78[0.12] SDG
StSG 20.87 ± 1.75[0.1] 23.16 ± 2.02[0.58] 28.58 ± 2.63*† [0.86] StSG
Vpeak
(m·kg-1·s-1)
CG 0.036 ± 0.004 0.036 ± 0.004 0.034 ± 0.004 CG
SDG 0.037 ± 0.004[0.18] 0.037 ± 0.004[0.08] 0.034 ± 0.004[0.05] SDG
StSG 0.038 ± 0.005[0.27] 0.037 ± 0.005[0.22] 0.036 ± 0.005*† [0.5] StSG
SFv
(N·s·kg-1·m-1)
CG 10.27 ± 0.67 11.32 ± 1.16 15.49 ± 2.35 CG
SDG 10.4 ± 0.85[0.17] 11.53 ± 1.34[0.17] 14.93 ± 1.97[0.26] SDG
StSG 9.91 ± 1.03[0.41] 10.58 ± 0.83[0.73] 13.26 ± 1.54*† [1.12] StSG
The effect sizes of the intervention and control groups are reported in square brackets.*: A significantly (P < 0.05) different from the CG.† : A significantly (P < 0.05) different from the SDG.‡: A significantly (P < 0.05) different from the 60°.CG: Control Group, StSG: Static Stretching Group, SDG: Static Stretching and Drop Jump Combined Group