## 3 Results
### Data Extraction
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Study Name** & **Participant Screening Criteria** & \multicolumn{1}{p{113.8 pt}}{**Control of Participant**} & \multicolumn{1}{p{113.8 pt}}{**Control of Setting**} \\ \cline{3-5}  & & **Confounding Variables** & **Confounding Variables** \\ \hline [PERSON] et al. (2021) & & - & Age & \\ [PERSON] et al. (2021) & & - & Diseases & \\ [PERSON] et al. (2021) & & - & Daily drug treatments & \\ [PERSON] et al. (2021) & - & No cardiovascular diseases & - & BMI (Height + Weight) & - \\ [PERSON] et al. (2021) & - & Able to change body posture without assistance. & - & Systolic and Diastolic & - \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Studies included in systematic review, alongside their participant screening criteria, gathered participant information and methods of controlling confounding variables. \begin{table}
\begin{tabular}{l c c c c} \hline \hline
**Study Name** & **Participant Screening Criteria** & \
\begin{tabular}{c} **Control of Participant** \\ **Confounding Variables** \\ \end{tabular} &
\begin{tabular}{c} **Control of Setting** \\ **Confounding Variables** \\ \end{tabular} \\ \hline \multirow{8}{*}{[PERSON] et al. (2019)[12]} & - & BMI between 18.5 and & - & Participants must refrain \\  & & 30 kg/m\({}^{2}\) & from stimulants, alcoholic \\  & - & Free of apparent & drinks, medication, and \\  & & diseases or physical & physical activity for at & - & Quiet environment \\  & & disorders & least 24 h prior to the & - & Room temperature set \\  & - & Physical activity levels \(>\) & study. & between 22 \({}^{\circ}\)C and \\  & & 150 min/week in the last & - & Participants took & 25 \({}^{\circ}\)C. \\  & & 6 months & questionnaires about their & - & Conducted from 2 p.m. \\  & - & Absence of drug & physical health, sedentary & to 4 p.m. \\  & - & Treatment & behavior levels, sleep & \\  & - & Male only & quality, and anamnesis for & \\  & - & Aged 18–40 years old & risk stratification & \\ \hline \multirow{8}{*}{[PERSON] et al. (2022)[13]} & \multirow{8}{*}{-} & \multirow{8}{*}{No cardiovascular, cerebrovascular, metabolic, motor, respiratory, and nervous system diseases} & - & Participants must fast for & \\  & - & No recent surgery or & 2 h before experimental & - & Conducted from 8 a.m. \\  & - & Male only & - & Participants must not & to 11:30 a.m. \\  & & & & drink alcohol, caffeine, & - & Laboratory maintained \\  & & system diseases & and other foods and drugs & & at 20–24 \({}^{\circ}\)C. \\  & - & No recent surgery or & & that would interfere with & - & Humidity of \\  & - & No recent surgery or & & the test results 24 h prior & laboratory maintained \\  & - & history of traumatic pain & & to data collection. & between 50 and 56\% \\  & - & Male only & - & Participants must fast for & \\  & & & 2 h before data collection & & \\ \hline \multirow{8}{*}{[PERSON] et al. (2007)[14]} & \multirow{8}{*}{-} & \multirow{8}{*}{Free of apparent diseases or physical disorders} & - & Participants completed & \\  & & Non-smokers & general health, & \\  & - & Aged 18–35 years old. & - & Participants were asked to & \\  & & & abstain from alcohol and & \\  & & exercise 12 h before data & & \\  & & collection & & \\ \hline \multirow{8}{*}{[PERSON] et al. (2007)[14]} & \multirow{8}{*}{-} & \multirow{8}{*}{Not taking any medication} & - & Participants underwent & \\  & & evaluations on anamnesis, & & blood tests, physical & \\  & & therapy inspection, heart & & \\  & & and lung auscultation, & & \\  & & blood pressure, and & - & Room temperature \\  & & cardiovascular evaluation. & maintained between & 22 \({}^{\circ}\)C and 24 \({}^{\circ}\)C. \\  & - & Not on any medication & & to consume caffeine or & - \\  & - & Male only & alcohol on the days before & & maintained between \\  & - & Male only & & the tests, to eat light meals, & 40\% and 60\%. \\  & & & and not to perform & \\  & & & physical activities 12 h & 2 p.m. and 6 p.m. \\  & & & before the tests. & \\ \hline \hline \end{tabular}
\end{table}