## 4 Discussion  
This study was unique in several important ways. First, we utilized near-optimal chaotic attractor embedding techniques to assess the effects of participants being in a state of HRV coherence on synchronization to each other and with the earth's magnetic field. Secondly, it was the first study to do continuous simultaneous long-term HRV monitoring on groups of participants located in different countries, with local magnetic field monitoring stations distributed around the planet. Finally, it was the first study to examine the impact of increasing participants' HRV coherence on synchronization of their heart rhythms to the resonant frequencies in the LMF. The participants used the HLI technique, which is a heart-focused meditation where they focused attention in the area of the heart and intentionally activated and radiated positive feelings to others in the study for a 15-min period. In analysis of the groups HRV coherence before, during and after the HLI, the California and New Zealand group members had the largest increase in HRV coherence during the HLI period. This is not surprising as these two groups had the most experience with using this technique. However, all the groups showed increased coherence and the group average coherence scores for all of the groups was in the range that is considered as high coherence during the HLI. The group locations were chosen so that they were in the same areas where we have magnetic field monitoring stations in order to compare the groups HRV with the local magnetic fields which were different at the various locations. Therefore, the analysis of synchronization between participants' HRV and LMF power were computed separately for each group's location. Since the global HLI took place for a 15-min period at 17:00 p.m. (UTC time), a \"day\" was defined as a 24-h period starting at 17:00 p.m. We calculated participants' daily LMF-HRV-synchronization over an 11-day period, which provided a 5-day period before, the day of and 5-days after the HLI day. The only day where all the groups HRV was positively correlated with the LMF was on the day of the HLI and the synchronization between the HRV and LMF for all the groups was significantly higher than most of the other days. It has been observed that individuals \begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Group**} & \multirow{2}{*}{**N**} & \multirow{2}{*}{**Mean**} & \multirow{2}{*}{**Lower**} & \multirow{2}{*}{**Upper**} & \multirow{2}{*}{**dF**} & \multirow{2}{*}{**Mean**} & & & \multicolumn{3}{c}{**Pairwise Comparisons**\({}^{\text{b}}\)} \\ \cline{6-14}  & & & & & & & & & & & & & \(p\)\textless{} & \(p\)\textless{} \\  & & & & & & & & & & & & \(1\) vs. 2 & 1 vs. 3 & 2 vs. 3 \\ \hline UK & 1 Before & 8 & 28.64 & 24.38 & 32.90 & 2 & 390.00 & 16.73 & 0.001 & 0.71 & 0.01 & ns. & 0.001 \\  & 2 During & 8 & 17.28 & 14.54 & 20.02 & & & & & & & & \\  & 3 After & 8 & 29.99 & 26.17 & 33.81 & & & & & & & & \\ \hline LT & 1 Before & 16 & 19.51 & 18.12 & 20.90 & 1.2\({}^{\text{a}}\) & 2128.96 & 52.90 & 0.001 & 0.78 & ns. & 0.001 & 0.001 \\  & 2 During & 16 & 18.05 & 16.31 & 19.80 & & & & & & & & \\  & 3 After & 16 & 34.21 & 30.37 & 38.05 & & & & & & & \\ \hline NZ & 1 Before & 19 & 41.49 & 38.73 & 44.26 & 2 & 777.36 & 18.34 & 0.001 & 0.51 & 0.001 & 0.001 & ns \\  & 2 During & 19 & 30.09 & 26.39 & 33.79 & & & & & & & & \\  & 3 After & 19 & 30.78 & 28.40 & 33.15 & & & & & & & \\ \hline SA & 1 Before & 11 & 31.53 & 28.63 & 34.42 & 2 & 294.63 & 16.48 & 0.001 & 0.62 & 0.001 & ns & 0.01 \\  & 2 During & 11 & 22.67 & 19.36 & 25.98 & & & & & & & \\  & 3 After & 11 & 31.74 & 28.55 & 34.93 & & & & & & & \\ \hline CA & 1 Before & 11 & 26.52 & 23.25 & 29.79 & 2 & 233.94 & 18.38 & 0.001 & 0.65 & 0.05 & ns & 0.001 \\  & 2 During & 11 & 21.21 & 17.98 & 24.43 & & & & & & & \\  & 3 After & 11 & 30.39 & 27.87 & 32.91 & & & & & & & \\ \hline \hline \end{tabular}
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