# Biofeedback Applied to Interactive Serious Games to Monitor Frailty in an Elderly Population
## 4 Results  
### Comparison of Results  
In addition to comparing the results obtained from a single exercise, it is also important to understand the dynamics of those results. This is necessary in order to understand the efficiency of the system in repeated use, as well as to ascertain the parameter of overall efficiency. Table 7 shows the results obtained from Exercise 4 over six days with a 12-h interval between exercises for one person. The exercises are performed in normal exercise mode and directly in the game. The comparison is made according to the same parameters that were shown in Table 6. The results presented are the specific case of a particular player. The results of other players are treated in the same way and according to the same methodology as presented below. Table 7 shows the results obtained from Exercise 4 in its two interpretations: game and usual. The effectiveness of the system can be judged following the first tests. One of the indicators of the system is time, which shows how fast the player completes a level. From this, it is possible to compile statistics on the player's progress, and this can be done by comparing it to the normal way of performing the exercise. In the example of the results obtained from Exercise 4 in Table 7 and Figure 12, the time value decreases in both cases of normal exercise and the in-game level. In essence, however, the time values for both cases mean a different situation. Figure 13 and Table 8 shows the progression of the results as a percentage. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Result**} & \multirow{2}{*}{**Time, s**} & **Min. Am.** & **Max. Am.** & **Min.** & **Min.** & **Min.** & **Min.** & **Min.** & **Min.** & **Jitter** & **Jitter** & **Jitter** \\  & & **plitude,** & **plitude,** & **Hz** & **dB** & **Relative** & **\%** & **Absolute** & **Relative** & **\%** \\ \hline \multicolumn{10}{c}{**Ordinary Exercise**} \\ \hline Etalon & 25.39 & –19.4 & 19.7 & 28.55 & 0.44 & 7.91 & 0.044 & 4.398 & 0.590 & 0.241 \\ Bad & 12.41 & –11.92 & 28.67 & 31.01 & 0.82 & 13.54 & 0.198 & 19.77 & 0.229 & 0.201 \\ Try 1 & 11.24 & –19.04 & 11.15 & 24.75 & 0.91 & 10.76 & 0.120 & 12 & 0.158 & 0.140 \\ Try 2 & 10.94 & –9.46 & 22.86 & 29.12 & 0.93 & 7.91 & 0.057 & 5.731 & 0.142 & 0.130 \\ Try 3 & 10.61 & –15.16 & 18.98 & 27.66 & 0.96 & 10.38 & 0.112 & 11.241 & 0.108 & 0.096 \\ Try 4 & 10.54 & –12.28 & 17.88 & 26.72 & 1.06 & 4.94 & 0.055 & 5.498 & 0.100 & 0.095 \\ Try 5 & 10.44 & –10.96 & 20.92 & 28.09 & 0.98 & 11.04 & 0.090 & 8.955 & 0.082 & 0.083 \\ Try 6 & 9.18 & –13.81 & 17.58 & 26.824 & 1.12 & 7.82 & 0.092 & 9.233 & 0.128 & 0.139 \\ \hline \multicolumn{10}{c}{**In-Game Exercise**} \\ \hline Etalon & 19.27 & –37.20 & 41.82 & 70.35 & 0.31 & 15.41 & 0.084 & 8.422 & 0.508 & 0.155 \\ Bad & 29.79 & –38.53 & 38.27 & 63.08 & 0.28 & 17.85 & 0.178 & 17.770 & 2.758 & 0.484 \\ Try 1 & 28.00 & –45.05 & 58.12 & 80.16 & 0.21 & 19.83 & 0.136 & 13.585 & 0.330 & 0.077 \\ Try 2 & 25.69 & –45.06 & 46.28 & 76.19 & 0.23 & 13.40 & 0.092 & 9.168 & 0.223 & 0.050 \\ Try 3 & 25.72 & –39.05 & 49.01 & 83.95 & 0.19 & 18.02 & 0.182 & 18.24 & 0.545 & 0.127 \\ Try 4 & 23.17 & –42.46 & 44.82 & 70.47 & 0.3 & 21.70 & 0.196 & 19.573 & 0.368 & 0.105 \\ Try 5 & 22.88 & –43.91 & 46.9 & 74.81 & 0.26 & 21.39 & 0.162 & 16.153 & 0.952 & 0.254 \\ Try 6 & 22.09 & –22.68 & 26.4935 & 43.81 & 0.23 & 15.76 & 0.153 & 15.327 & 0.778 & 0.187 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: The results obtained from Exercise 4 in its two interpretations: game and usual. Figure 12: Visual representation of Exercise 4 result comparison in time, frequency, % of Shimmer and Jitter. Where (**a**)—time value for each try of Exercise 4, (**b**)—frequency value of each Exercise 4 try, (**c**)—percent of shimmer value influence on signal for each Exercise 4 try, (**d**)—percent of jitter value influence on signal for each Exercise 4 try. Figure 13: Comparison of both variations of Exercise 4.