# The Acute Influence of Whole-Body Cryotherapy on Electromyographic Signals and Jumping Tasks
## 4 Discussion  
The World Health Organization (WHO) recommends at least 60 min of moderate-to-vigorous everyday physical activity to counter harmful cardiovascular, neuromuscular, and metabolic developments [4]. In following the WHO guidelines, a larger number of people take up physical activity. Different initial levels of preparation for performing physical activity lead to the increased risk of several types of injury. One of the parameters may include the elasticity of tissue. In a mechanical sense, elasticity refers to a response to the removal of applied force. [PERSON] et al. explained that the concept of elasticity applies to deformable bodies, which store and give elastic energy [24]. Changes in elasticity may aim to increase or decrease its value. A reduction in elasticity may lead to an increase in the risk of injury to the soft tissues of the musculoskeletal system. On the other hand, a higher rate of lower-limb stiffness is associated with higher performance in athletic tasks such as jumping, skipping, throwing, endurance running, sprinting, and change-of-direction running [24,25]. In our study, changes in elasticity were aimed to reduce its value. The \begin{table}
\begin{tabular}{c c c c c} \hline \hline  & \
\begin{tabular}{c} **Bioelectrical Resting** \\ **Activity (\(\mu\)V)** \\ \end{tabular} & **MVC (\%)** &
\begin{tabular}{c} **Bioelectrical Resting** \\ **Activity (\(\mu\)V)** \\ \end{tabular} & **MVC (\%)** \\ \hline Before & 1.75 \(\pm\) 1.96 & 1.56 \(\pm\) 1.26 & 64.12 \(\pm\) 61.98 & 46.4 \(\pm\) 10.1 \\ \hline After & 1 min & 2.82 \(\pm\) 3.59 & 2.55 \(\pm\) 2.68 & 61.53 \(\pm\) 58.16 & 53.75 \(\pm\) 7.24 \\ \hline Difference & 61\% \(p<0.46\) & 63\% \(p<0.16\) & 4\% \(p<0.14\) & 16\% \(p<0.05\) * \\ \hline Before & 1.75 \(\pm\) 1.96 & 1.056 \(\pm\) 1.26 & 64.12 \(\pm\) 61.98 & 46.4 \(\pm\) 10.1 \\ \hline After & 3 min & 2.21 \(\pm\) 3.21 & 2,4 \(\pm\) 3.3 & 94.26 \(\pm\) 102.34 & 49.71 \(\pm\) 8.84 * \\ \hline Difference & 26\% \(p<0.73\) & 45\% \(p<0.28\) & 26\% \(p<0.19\) & 7\% \(p<0.27\) \\ \hline \hline \end{tabular}  
* Statistically significant differences \(p<0.05\).  
\end{table} 
Table 2: The mean values and standard deviation of bioelectrical activity of the rectus femoris before whole-body cryotherapy and after 3 min of whole-body cryotherapy. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \begin{tabular}{c} **Maximum** \\ **Height (cm)** \\ \end{tabular} & \begin{tabular}{c} **Take-Off** \\ **Force (kN)** \\ \end{tabular} & \begin{tabular}{c} **Landing** \\ **Force (kN)** \\ \end{tabular} & \
\begin{tabular}{c} **Maximum** \\ **Concentric Force** \\ **(kW)** \\ \end{tabular} &
\begin{tabular}{c} **Maximum** \\ **Velocity (m/s)** \\ \end{tabular} & **Elasticity** \\ \hline Before & 46.39 \(\pm\) 6.82 & 1.27 \(\pm\) 0.47 & 2.18 \(\pm\) 0.56 & 5.1 \(\pm\) 1.54 & 3.12 \(\pm\) 0.61 & 84.23 \(\pm\) 18.21 \\ \hline After & 1 min & 49.9 \(\pm\) 5.19 & 1.38 \(\pm\) 0.5 & 2.22 \(\pm\) 0.47 & 5.44 \(\pm\) 0.5 & 3.33 \(\pm\) 0.23 & 84.17 \(\pm\) 7.31 \\ \hline Difference & 8\% \(p<0.61\) & 9\% \(p<0.31\) & 2\% \(p<0.65\) & 7\% \(p<0.44\) & 6\% \(p<0.72\) & 1\% \(p<0.06\) \\ \hline Before & 46.39 \(\pm\) 6.82 & 1.27 \(\pm\) 0.47 & 2.18 \(\pm\) 0.56 & 5.1 \(\pm\) 1.54 & 3.12 \(\pm\) 0.61 & 84.23 \(\pm\) 18.21 \\ \hline After & 3 min & 46.36 \(\pm\) 5.19 & 1.34 \(\pm\) 0.39 & 2.16 \(\pm\) 0.49 & 5.75 \(\pm\) 1.24 & 3.2 \(\pm\) 0.3 & 77.96 \(\pm\) 25.17 \\ Difference & 1\% \(p<0.27\) & 6\% \(p<0.46\) & 1\% \(p<0.27\) & 13\% \(p<0.14\) & 3\% \(p<0.71\) & 7\% \(p<0.04\) * \\ \hline \hline \end{tabular}  
* Statistically significant differences \(p<0.05\).  
\end{table} 
Table 3: Mean values and standard deviation of selected component parameters of the countermovement jump before the exposure to whole-body cryotherapy and after 3 min of whole-body therapy. reduction in elasticity was statistically significant after 3 min WBC, compared with the values recorded before WBC.