Coupling measurements for the 125 GeV Higgs Boson in the fermion decay channels with the ATLAS detector

Detailed measurements of the properties of the 125 GeV Higgs boson are fundamental for the understanding of the mechanism reponsible for the electroweak symmetry breaking. Measurements of the Higgs boson in fermion final states allow to study the Yukawa couplings of the Higgs boson through the decay mode and the gauge couplings of the Higgs boson through the production mode. This talk summarizes the measurements of the 125 GeV Higgs boson in decays involving $b$ quarks, $\tau$ leptons and muons with the ATLAS experiment at the LHC.