Influence of the magnetic activity cycle on the asteroseismic age and mass based on BiSON data. The individual frequencies were used as constraints for the blue data, while the frequency separation ratios (r₀₁ and r₀₂) and the inverted mean density, ${\overline{\rho }}_{\mathrm{inv}}$, were used for the orange data. The 10.7 cm radio emission flux, which serves as a proxy of the solar cycle, is denoted in black. The correlation with the activity proxy is measured with the Spearman rank coefficient, ℛ. The purple line was obtained by smoothing the orange data with a Savitzky-Golay filter.