## 4 Discussion
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**BJ**} & \multicolumn{4}{c}{**CG**} \\ \hline  & \multicolumn{2}{c}{**Pre**} & \multicolumn{2}{c}{**Post**} & \multicolumn{2}{c}{**Pre**} & \multicolumn{2}{c}{**Post**} & \multicolumn{2}{c}{**Post**} \\ \hline  & **Average** & \({}^{\text{1}}\)**sd** & **Average** & \({}^{\text{1}}\)**sd** & \({}^{\text{2}}\)**\(p\)** & **Average** & \({}^{\text{1}}\)**sd** & **Average** & \({}^{\text{1}}\)**sd** & \({}^{\text{2}}\)**\(p\)** \\ \hline
**Height** & 161.11 & 6.83 & 161.11 & 6.83 & 1.000 & 161.31 & 4.45 & 161.31 & 4.45 & 1.000 \\
**Weight** & 54.59 & 10.44 & 54.39 & 10.32 & 0.409 & 57.76 & 5.34 & 57.95 & 5.32 & 0.556 \\
**BMI 3** & 22.39 & 2.23 & 22.26 & 2.03 & 0.218 & 22.23 & 2.16 & 22.28 & 2.31 & 0.779 \\ \(\sum\) SF 4  & 147.65 & 24.61 & 138.03 & 21.17 & **0.003** & 133.76 & 35.52 & 137.22 & 36.00 & 0.075 \\
**WHI 5** & 0.72 & 0.04 & 0.72 & 0.04 & 0.429 & 0.72 & 0.03 & 0.73 & 0.03 & **0.047** \\
**Fat mass (\%) 6** & 21.52 & 1.99 & 20.54 & 1.78 & **0.002** & 21.76 & 3.24 & 21.88 & 3.62 & **0.010** \\
**Muscle mass 7** & 22.34 & 3.90 & 22.58 & 3.95 & 0.506 & 22.50 & 4.71 & 22.52 & 4.67 & 0.916 \\
**Bone mass 8** & 9.12 & 1.17 & 9.12 & 1.17 & 1.000 & 8.80 & 0.98 & 8.80 & 0.98 & 1.000 \\
**Subsec 9** & 13.43 & 2.96 & 12.69 & 3.11 & **0.050** & 12.75 & 4.20 & 13.36 & 5.06 & 0.600 \\
**Tricip 10** & 18.26 & 2.77 & 16.95 & 2.17 & **0.016** & 16.55 & 3.84 & 16.38 & 3.94 & 0.754 \\
**Bicip 11** & 8.54 & 2.53 & 9.57 & 4.21 & 0.683 & 7.85 & 2.21 & 8.72 & 3.19 & 0.099 \\
**Suprailic 12** & 22.54 & 5.55 & 20.10 & 4.10 & **0.008** & 19.21 & 6.04 & 19.92 & 6.27 & 1.000 \\
**Supraspanie 13** & 15.04 & 3.89 & 13.64 & 2.99 & **0.028** & 13.72 & 5.70 & 14.53 & 5.56 & 0.116 \\
**Abdom 14** & 22.30 & 4.34 & 20.26 & 4.25 & **0.005** & 20.61 & 8.00 & 21.68 & 8.81 & 0.117 \\
**Front thigh 15** & 30.71 & 8.73 & 29.26 & 9.06 & 0.152 & 26.08 & 6.98 & 27.02 & 6.58 & 0.162 \\
**Med. Calf 16** & 16.89 & 4.53 & 16.49 & 4.24 & 0.530 & 14.70 & 2.94 & 15.24 & 2.41 & 0.346 \\
**Arm circum 17** & 27.71 & 2.42 & 27.87 & 1.87 & 0.969 & 27.91 & 2.23 & 27.75 & 2.37 & 0.363 \\
**Contract arm 18** & 27.86 & 2.51 & 28.87 & 2.21 & **0.050** & 28.55 & 2.07 & 28.73 & 2.07 & 0.479 \\
**Thigh circum 19** & 50.96 & 4.98 & 51.27 & 4.32 & 0.801 & 51.18 & 3.27 & 51.00 & 3.22 & 0.484 \\
**Callf circum 20** & 35.40 & 2.85 & 35.54 & 2.77 & 0.944 & 34.76 & 2.26 & 34.96 & 2.17 & 0.288 \\ \hline \hline \end{tabular}   
* \({}^{\text{1}}\) standard deviation; \({}^{\text{2}}\) = p value; \({}^{\text{3}}\) = body max index; \({}^{\text{4}}\) = summatory of skinkolds (mm); \({}^{\text{5}}\) = waist-hip index; \({}^{\text{6}}\) = fat mass percentage (%); \({}^{\text{7}}\) = muscle mass (kg); \({}^{\text{8}}\) = bone mass (kg); \({}^{\text{9}}\) = subsepular skinkold (mm); \({}^{\text{10}}\) = tricipital skinkold (mm); \({}^{\text{11}}\) = bicipital skinkold (mm); \({}^{\text{12}}\) = supriximic skinkold (mm); \({}^{\text{13}}\) = supriximic skinkold (mm); \({}^{\text{16}}\) = medial calf skinkold (mm); \({}^{\text{17}}\) = relaxed arm circumference (cm);concentration and coordination, and the trampoline is strongly pushed with both legs. HIIT has already shown greater physical fitness effects than uniform continuous training in short training programs (4 to 12 weeks) [29; 30]. In fact, [PERSON] et al. [31] reported the effectiveness of HIIT in a very short time period showing significantly enhanced VO2 max and power output in active men and women after only 6 HIIT training sessions. In addition, HIIT training protocol with repetitions of high-intensity efforts from 30 to 60 s has been recommended to maximize the effects of aerobic training in all populations [32]. Precisely, the moments of maximum effort, which are demanded during the Body Jump(r) class, had this duration. BJ also significantly increased their 1 RM values in the half-squat exercise.