  The results of an analysis are presented of some recent data on the reactions
$e^+e^-\to\pi^+\pi^-\pi^+\pi^-$, $e^+e^-\to\pi^+\pi^-\pi^0\pi^0$ with the
subtracted $\omega\pi^0$ events, $e^+e^-\to\omega\pi^0$, $e^+e^-\to\eta
\pi^+\pi^-$, $e^+e^-\to\pi^+\pi^-$, $J/\psi\to\pi^+\pi^-\pi^0$ and
$K^-p\to\pi^+\pi^-\Lambda$, upon taking into account both the strong energy
dependence of the partial widths on energy and the previously neglected mixing
of the $\rho$ type resonances. The above effects are shown to exert an
essential influence on the specific values of masses and coupling constants of
heavy resonances and hence are necessary to be accounted for in establishing
their true nature.
