The most impoant factor for maintaining arches of the foot is
Factors in maintaining arches of foot are1 The shape of the bones concerned.2 intersegmental ties/staples or ligaments (and muscles) that hold the different segments of the arch together.3 Tie beams or bowstrings that connect the two ends of the arch.4 Slings that keep the summit of the arch pulled up.5 Suspension"The longitudinal arches are prevented from flattening by the plantar aponeurosis, and by the muscles of the first layer of the sole."Ref: Vishram Singh; Volume II; 2nd edition
Shapes of bones
Ligaments of plantar aponeurosis
Tendons of muscles
Intearsal joints
Lower limb