  We review the latest experimental achievements on the hadronic cross section
measurements at low energy which are of fundamental importance for a precise
evaluation of the hadronic contribution to the g-2 of the muon. We also discuss
the new proposed muon g-2 experiments, with particular emphasis on E989 at
Fermilab which plans to improve the experimental uncertainty by a factor of 4
with respect to the previous E821 experiment at BNL
