## 3 Results  
Table 2 shows the descriptive and inferential analyses of the total impacts suffered and per intensities regarding the music style and the body location where the inertial devices were attached. Older people had a total sum of 2805.92 impacts on the scapulae, 6013.09 on the lower back, 11,822.79 on the left knee, 12,127.90 on the right knee, 8912.86 on the left ankle, and 8615.49 on the right ankle during the dance lesson. The majority of impacts were at very low (Imp\({}_{<2\text{G}}\); scapulae: 98.60%; lower back: 99.09%; left knee: 87.73%; right knee: 87.45%; left ankle: 69.09%; and right ankle: 67.37%) or low intensities (Imp\({}_{2\text{-G}}\); scapulae: 1.34%; lower back: 0.82%; left knee: 10.59%; right knee: 10.67%; \begin{table}
\begin{tabular}{c c c c} \hline
**Order** & **Music Style** & **Beats per Minute** & **Duration** \\ \hline
1 & Kizomba & 80 & 4 min \\
2 & Roots & 85 & 4 min 26 s \\
3 & Cumbia & 124 & 4 min 6 s \\
4 & Vallenato & 114 & 3 min 3 s \\
5 & Bachata & 110 & 3 min 14 s \\
6 & Cumbia & 93 & 3 min 44 s \\
7 & Salsa & 124 & 3 min 22 s \\
8 & Merengue & 136 & 4 min 9 s \\
9 & Cumbia & 125 & 3 min 8 s \\
10 & Bachata & 110 & 4 min 3 s \\
11 & Merengue & 142 & 4 min 52 s \\
12 & Bolero & 100 & 2 min 47 s \\
13 & Cumbia & 126 & 2 min 53 s \\
14 & Chachacha & 114 & 3 min 51 s \\
15 & Cumbia & 94 & 4 min 19 s \\
16 & Bolero & 103 & 4 min \\ \hline \end{tabular}
\end{table} 
Table 1: Description of the order, music style, music velocity, and song duration. left ankle: 21.16%; and right ankle: 22.36%). Impacts at moderate (4-6 g), high (6-8 g), and very high (8-10 g) intensities only were found on the knees (Imp\({}_{\text{4-6G}}\): 1.43-1.58%; Imp\({}_{\text{6-8G}}\): 0.19-0.23%; and Imp\({}_{\text{8-10G}}\): 0.03-0.04%) and ankles (Imp\({}_{\text{4-6G}}\): 6.85-7.17%; Imp\({}_{\text{6-8G}}\): 2.16-2.23%; and Imp\({}_{\text{8-10G}}\): 0.55-0.62%), with a very reduced frequency. Finally, severe impacts (>10 g) only were registered on the ankles, being in the range from 16-to-21 impacts in the total session (0.18-0.25%). Regarding body locations, statistical differences with a large effect size were found for the total impacts (\(F\) = 429.29; \(p\) < 0.01; \(\omega_{p}\)\({}^{2}\) = 0.43) and per intensities (\(F\) = 103.94-to-665.55; \(p\) < 0.01; \(<\)2 g, \(\omega_{p}\)\({}^{2}\) = 0.40; 2-4 g, \(\omega_{p}\)\({}^{2}\) = 0.54; 4-6 g, \(\omega_{p}\)\({}^{2}\) = 0.35; 6-8 g, \(\omega_{p}\)\({}^{2}\) = 0.25; and 8-10 g, \(\omega_{p}\)\({}^{2}\) = 0.15), except for a medium effect size for severe impacts (>10 g; \(F\) = 40.70; \(p\) < 0.01; \(\omega_{p}\)\({}^{2}\) = 0.07). Specifically, most of the impacts at a very low intensity (<2 g) were received by the knees (\(p\) < 0.01, \(d\) = 2.73-to-3.25, very high; knees > ankles > lower back > scapulae). Instead, most of the impacts at low, moderate, high, and very high intensities were suffered by the ankles (\(p\) < 0.01; \(d\) = 1.03-to-4.95, moderate to very high; ankles > knees > lower back > scapulae). At a severe intensity (>10 g), only differences were found between the ankles and the rest of the locations (\(p\) < 0.01, \(d\) = 0.41-to-0.71, low to moderate; ankles > knees = lower back = scapulae). The location that registered lower impacts in the total impacts at all intensity levels was the scapulae, followed by the lower back. No differences were found regarding laterality both at the knees (\(p\) = 0.94, \(d\) < 0.02) and ankles (\(p\) > 0.74, \(d\) < 0.27) in the total impacts and per intensities.