The study delves into the effects of the Schumann resonator frequency on both the electromagnetic background parameters and the variability indices of the human heart period during unrestricted activity. Analysis of 24-hour synchronous monitoring data reveals that the overall correlation between heart rate variability indices and Schumann resonance parameters is notably weak. However, a more nuanced examination, considering characteristic time intervals of the day with varying levels of motor activity among subjects, exhibits a significantly higher level of correlation. In specific cases, up to 35 percent of volunteers show a strong correlation between heart rate variability and Schumann resonance parameters, suggesting a complex and context-dependent relationship that merits further investigation.