# Reaction Time and Postural Control Under Dual-Task Conditions in Brazilian Jiu-Jitsu Athletes
## 3 Results
### Comparison and Correlations Within Control Group
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Group** & **Brazilian Jiu-Jitsu** & **Control** & **U-Value** & **\(p\)-Value** & **Effect Size** \\ \hline \multicolumn{5}{c}{Reaction time parameters} \\ \hline R\_standing [s] & 0.42 (0.40; 0.45) & 0.47 (0.42; 0.49) & 62.5 & \(p\) = 0.0242 * & 0.4 \\ R\_sitting [s] & 0.41 (0.37; 0.43) & 0.44 (0.41; 0.47) & 57 & \(p\) = 0.0134 * & 0.4 \\ N\_standing [-] & 76 (73; 78) & 73 (69.5; 77) & 71 & \(p\) = 0.0538 & 0.4 \\ N\_sitting [-] & 77 (76; 80) & 75.50 (72; 77) & 53 & \(p\) = 0.0077 * & 0.5 \\ \hline \multicolumn{5}{c}{Linear parameters} \\ \hline CoP\_path\_2 eo [mm] & 217 (186; 250.50) & 236 (193; 264.25) & 97.5 & \(p\) = 0.3844 & 0.16 \\ CoP\_path\_1 eo [mm] & 1083 (956.25; 1251) & 1131 (1006; 1218.50) & 114 & \(p\) = 0.8278 & 0.04 \\ CoP\_path\_2 eos [mm] & 225 (196.25; 290.50) & 235 (191; 271) & 111 & \(p\) = 0.7368 & 0.06 \\ CoP\_path\_1 eos [mm] & 1437 (1286.5; 1619) & 1571 (1453.75; 1846.25) & 84 & \(p\) = 0.1605 & 0.25 \\ \hline \multicolumn{5}{c}{Nonlinear parameters} \\ \hline SampEn\_ML\_2 eo [-] & 0.34 (0.30; 0.39) & 0.36 (0.32; 0.39) & 111 & \(p\) = 0.0134 * & 0.06 \\ SampEn\_AP\_2 eo [-] & 0.26 (0.22; 0.33) & 0.25 (0.22; 0.32) & 110 & \(p\) = 0.7368 & 0.07 \\ FD\_ML\_2 eo [-] & 1.95 (1.92; 1.96) & 1.95 (1.93; 1.96) & 110 & \(p\) = 0.7072 & 0.07 \\ FD\_AP\_2 eo [-] & 1.89 (1.87; 1.93) & 1.90 (1.88; 1.94) & 105 & \(p\) = 0.7072 & 0.1 \\ LyE\_ML\_2 eo [-] & 0.08 (0.08; 0.1) & 0.09 (0.08; 0.10) & 103 & \(p\) = 0.5665 & 0.12 \\ LyE\_AP\_2 eo [-] & 0.07 (0.06; 0.08) & 0.07 (0.07; 0.08) & 113 & \(p\) = 0.5142 & 0.05 \\ SampEn\_ML\_1 eo [-] & 0.59 (0.58; 0.60) & 0.59 (0.57; 0.60) & 117 & \(p\) = 0.7972 & 0.02 \\ SampEn\_AP\_1 eo [-] & 0.59 (0.58; 0.60) & 0.59 (0.58; 0.59) & 86 & \(p\) = 0.9212 & 0.24 \\ FD\_ML\_1 eo [-] & 2.01 (2; 2.01) & 2 (1.99; 2.01) & 112 & \(p\) = 0.1854 & 0.05 \\ FD\_AP\_1 eo [-] & 2.01 (2; 2.01) & 2.01 (2; 2.01) & 91 & \(p\) = 0.7668 & 0.2 \\ LyE\_ML\_1 eo [-] & 0.15 (0.13; 0.16) & 0.13 (0.12; 0.14) & 56 & \(p\) = 0.0120 * & 0.45 \\ LyE\_AP\_1 eo [-] & 0.09 (0.08; 0.10) & 0.09 (0.08; 0.10) & 109 & \(p\) = 0.6781 & 0.07 \\ SampEn\_ML\_2 eos [-] & 0.36 (0.3; 0.40) & 0.33 (0.29; 0.41) & 112 & \(p\) = 0.7668 & 0.05 \\ SampEn\_AP\_2 eos [-] & 0.25 (0.2; 0.33) & 0.24 (0.22; 0.26) & 117 & \(p\) = 0.9212 & 0.02 \\ FD\_ML\_2 eos [-] & 1.94 (1.93; 1.96) & 1.94 (1.92; 1.97) & 116 & \(p\) = 0.8899 & 0.02 \\ FD\_AP\_2 eos [-] & 1.90 (1.86; 1.94) & 1.89 (1.88; 1.92) & 114 & \(p\) = 0.8278 & 0.04 \\ LyE\_ML\_2 eos [-] & 0.09 (0.08; 0.10) & 0.09 (0.08; 0.10) & 118 & \(p\) = 0.9527 & 0.01 \\ LyE\_AP\_2 eos [-] & 0.07 (0.06; 0.07) & 0.06 (0.05; 0.07) & 108 & \(p\) = 0.6494 & 0.08 \\ SampEn\_ML\_1 eos [-] & 0.60 (0.59; 0.60) & 0.60 (0.59; 0.60) & 120 & \(p\) = 0.9842 & 0.01 \\ SampEn\_AP\_1 eos [-] & 0.60 (0.59; 0.61) & 0.60 (0.60; 0.61) & 88 & \(p\) = 0.2130 & 0.22 \\ FD\_ML\_1 eos [-] & 2.007 (2.003; 2.0101) & 2.009 (2.005; 2.011) & 100 & \(p\) = 0.44082 & 0.14 \\ FD\_AP\_1 eos [-] & 2.0102 (2.008; 2.0109) & 2.012 (2.011; 2.013) & 37 & \(p\) = 0.0011 * & 0.59 \\ LyE\_ML\_1 eos [-] & 0.15 (0.13; 0.16) & 0.15 (0.14; 0.16) & 82 & \(p\) = 0.1382 & 0.27 \\ LyE\_AP\_1 eos [-] & 0.096 (0.089; 0.10) & 0.092 (0.087; 0.10) & 97 & \(p\) = 0.3737 & 0.16 \\ \hline \hline \end{tabular}  
* R_standing—reaction time in standing position; R_sitting—reaction time in sitting position; N_standing—the number of lights off in the standing position; N_sitting—the number of lights off in the sitting position; CoP—center of pressure; CoP_path—center of pressure path length; AP—anterior–posterior direction; ML—mediolateral direction; SampEn—Sample Entropy; FD—fractal dimension; LyE—Lyapunov Exponent; 2 eo—bipedal standing; 1 eo—single-leg standing; 2 eo—bipedal standing with visual tracking; 1 eo—single-leg standing with visual tracking.  
\end{table}