Table 3.
Kinetic and kinematic differences between Caffeine and Placebo conditions in the unilateral CMJ.
| Right | Left | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Placebo | Caffeine | Placebo | Caffeine | |||||||||
| Mean | SD | Mean | SD | p | ES | Mean | SD | Mean | SD | p | ES | |
| Conc MF/BM [N/kg] | 14.77 | 1.43 | 14.94 | 1.46 | 0.176 | 0.27 | 14.69 | 1.51 | 14.82 | 1.40 | 0.213 | 0.22 |
| Conc MF [N] | 1033.8 | 168.1 | 1045.3 | 165.1 | 0.181 | 0.26 | 1041.6 | 151.8 | 1053.4 | 164.6 | 0.159 | 0.28 |
| Conc PF/BM [N/kg] | 17.91 | 2.16 | 18.34 | 2.31 | 0.069 | 0.44 | 17.61 | 2.35 | 17.94 | 1.91 | 0.251 | 0.18 |
| Conc PF [N] | 1266.2 | 222.2 | 1289.7 | 232.5 | 0.087 | 0.40 | 1257.4 | 189.1 | 1284.9 | 211.5 | 0.221 | 0.21 |
| Conc M Power/BM [W/kg] | 13.66 | 3.82 | 14.34 | 3.14 | 0.125 | 0.34 | 13.54 | 2.92 | 13.93 | 3.16 | 0.199 | 0.23 |
| Conc M Power [W] | 972.2 | 335.3 | 1013.0 | 281.4 | 0.158 | 0.29 | 973.8 | 260.7 | 999.5 | 266.9 | 0.219 | 0.21 |
| FT [ms] | 341.50 | 53.82 | 349.00 | 61.24 | 0.044 | 0.52 | 335.79 | 55.52 | 340.93 | 54.56 | 0.182 | 0.25 |
| CT [ms] | 881.73 | 187.39 | 857.89 | 180.85 | 0.234 | −0.21 | 937.39 | 174.78 | 880.46 | 185.12 | 0.078 | −0.40 |
| FT:CT | 0.40 | 0.10 | 0.42 | 0.11 | 0.094 | 0.39 | 0.37 | 0.10 | 0.41 | 0.10 | 0.040 | 0.51 |
| JH (Flight Time) [cm] | 14.65 | 4.54 | 15.37 | 5.33 | 0.039 | 0.54 | 14.21 | 4.61 | 14.60 | 4.73 | 0.211 | 0.22 |
| JH (Imp-Mom) [cm] | 12.34 | 6.04 | 13.64 | 4.98 | 0.116 | 0.35 | 11.94 | 4.39 | 12.74 | 4.52 | 0.181 | 0.25 |
| P Power/BM [W/kg] | 25.37 | 6.95 | 26.76 | 5.86 | 0.131 | 0.33 | 24.63 | 4.71 | 25.65 | 5.21 | 0.098 | 0.36 |
| P Power [W] | 1809.1 | 624.9 | 1889.7 | 526.0 | 0.173 | 0.27 | 1773.3 | 453.2 | 1835.9 | 446.7 | 0.111 | 0.34 |
| Conc Dur [ms] | 320.81 | 54.36 | 327.39 | 60.93 | 0.310 | 0.14 | 326.89 | 51.69 | 325.71 | 60.86 | 0.470 | −0.02 |
| Conc Impulse [Ns] | 107.94 | 34.76 | 113.66 | 29.90 | 0.098 | 0.38 | 108.51 | 28.67 | 111.09 | 26.45 | 0.243 | 0.19 |
| Conc P Vel [m/s] | 1.72 | 0.34 | 1.80 | 0.27 | 0.104 | 0.37 | 1.71 | 0.24 | 1.75 | 0.26 | 0.220 | 0.21 |
| Conc RFD/BM [N/s/kg] | 14.77 | 11.02 | 15.96 | 15.00 | 0.330 | 0.12 | 10.80 | 3.44 | 13.90 | 9.47 | 0.136 | 0.31 |
| Conc RFD [N/s] | 1017.6 | 662.3 | 1086.2 | 973.5 | 0.368 | 0.10 | 782.1 | 286.9 | 977.2 | 654.0 | 0.159 | 0.28 |
| Conc RPD/BM [W/s/kg] | 114.36 | 44.99 | 119.39 | 44.57 | 0.255 | 0.19 | 110.85 | 47.72 | 116.51 | 41.71 | 0.268 | 0.17 |
| Conc RPD [W/s] | 8055.0 | 3214.4 | 8346.8 | 3013.3 | 0.288 | 0.16 | 7821.8 | 3028.0 | 8302.0 | 2969.0 | 0.227 | 0.21 |
| F at P Power [N] | 1147.8 | 190.6 | 1157.8 | 182.6 | 0.239 | 0.20 | 1132.4 | 161.2 | 1156.3 | 167.0 | 0.082 | 0.39 |
| RSI-modified [m/s] | 0.17 | 0.07 | 0.19 | 0.07 | 0.034 | 0.56 | 0.16 | 0.06 | 0.18 | 0.07 | 0.040 | 0.51 |
| Vel at P Power [m/s] | 1.55 | 0.30 | 1.61 | 0.24 | 0.135 | 0.32 | 1.55 | 0.21 | 1.58 | 0.23 | 0.308 | 0.14 |
| Braking Phase Dur [s] | 0.37 | 0.11 | 0.36 | 0.11 | 0.396 | −0.07 | 0.38 | 0.11 | 0.36 | 0.13 | 0.297 | −0.15 |
| Ecc Braking RFD/BM [N/s/kg] | 36.85 | 25.57 | 33.73 | 20.48 | 0.217 | −0.22 | 34.79 | 25.62 | 34.04 | 20.31 | 0.442 | −0.04 |
| Ecc Braking RFD [N/s] | 2408.0 | 1255.4 | 2346.3 | 1299.9 | 0.400 | −0.07 | 2419.7 | 1479.7 | 2430.7 | 1417.1 | 0.488 | 0.01 |
| Ecc Dec Phase Dur [s] | 0.21 | 0.06 | 0.20 | 0.06 | 0.061 | −0.46 | 0.23 | 0.08 | 0.21 | 0.09 | 0.228 | −0.21 |
| Ecc Dec RFD/BM [N/s/kg] | 36.08 | 23.14 | 37.69 | 25.08 | 0.329 | 0.13 | 37.36 | 32.62 | 38.68 | 26.63 | 0.421 | 0.05 |
| Ecc Dec RFD [N/s] | 2505.6 | 1529.3 | 2626.7 | 1612.9 | 0.314 | 0.14 | 2574.1 | 1954.3 | 2764.5 | 1821.3 | 0.340 | 0.11 |
| Ecc M Braking F [N] | 774.62 | 103.64 | 761.64 | 101.46 | 0.060 | −0.47 | 795.02 | 103.05 | 782.24 | 116.14 | 0.159 | −0.28 |
| Ecc M Dec F [N] | 955.07 | 142.82 | 948.30 | 170.99 | 0.346 | −0.11 | 921.43 | 102.05 | 930.90 | 181.65 | 0.392 | 0.08 |
| Ecc MF [N] | 693.73 | 86.30 | 689.50 | 86.54 | 0.076 | −0.42 | 704.86 | 94.05 | 703.46 | 94.71 | 0.324 | −0.13 |
| Ecc M Power/BM [W/kg] | 3.70 | 0.51 | 3.54 | 0.85 | 0.203 | −0.24 | 3.66 | 0.64 | 3.38 | 0.83 | 0.165 | −0.27 |
| Ecc M Power [W] | 260.74 | 60.99 | 250.77 | 87.97 | 0.245 | −0.20 | 259.25 | 52.79 | 243.64 | 78.50 | 0.204 | −0.23 |
| Ecc PF/BM [N/kg] | 16.27 | 2.20 | 16.18 | 2.25 | 0.409 | −0.07 | 16.46 | 2.76 | 16.23 | 2.36 | 0.352 | −0.10 |
| Ecc PF [N] | 1149 | 214 | 1139 | 228 | 0.357 | −0.10 | 1175.1 | 206.6 | 1167.9 | 251.7 | 0.432 | −0.05 |
| F at Zero Vel [N] | 1145 | 213 | 1134 | 228 | 0.331 | −0.12 | 1171.5 | 210.2 | 1164.4 | 250.5 | 0.432 | −0.05 |
Bolded p values denote significant differences between conditions (p < 0.05). BM = Body mass; Conc MF = concentric mean force; Conc PF = concentric peak force; Conc M power = concentric mean power; FT = Flight time; CT = Contraction time; FT:CT = ratio between flight time and contraction time; JH = Jump height; P power = concentric peak power; Conc Dur = duration of the concentric phase; Conc P Vel = concentric peak velocity; Conc RFD = concentric rate of force development; Conc RPD = concentric rate of power development; F at P Power = Force at peak power; RSI-mod = Reactive strength index-modified; Vel at P Power = Velocity at peak power; Braking phase dur= braking phase duration; Ecc Braking RFD = rate of force development during braking phase; Ecc Dec Phase Dur = Duration of the eccentric deceleration phase; Ecc Dec RFD = rate of force development during deceleration phase; Ecc M Braking F = mean force during braking phase; Ecc M Dec F = mean force during deceleration phase; Ecc MF = Eccentric mean force; Ecc M Power = Eccentric mean power; Ecc PF = Eccentric peak force; F at Zero Vel = Force at zero velocity.