Electron kinetics related to ionization waves is discussed using the results of temporally and radial-spatially resolved Langmuir probe measurements during propagation of an artificially excited ionization wave packet along a helium positive column at 0.55 Torr pressure and 200 mA discharge current. The results show a strong interdependence between the axial and radial electric field fluctuations and the electron energy distribution fluctuations. Fluctuations in the electron energy distribution function related to the ionization waves revealed a complex energy spectrum whose low (0–10 eV) and high (10–25 eV) energy regions oscillate with opposite phases.