  In this work, the early evolution of low-mass fully convective stars is
studied in the context of DHOST (degenerate higher order scalar-tensor)
theories of gravity. Although it is known that the hydrostatic equilibrium
equation is modified for scalar-tensor gravity, the consequent modifications to
the early evolution phases of a star were not explored in this framework. With
this in mind, we consider three evolutionary phases - contraction to the main
sequence, lithium burning and entrance to the main sequence - and investigate
how each of these phases is affected by the theory's parameter. Taking these
effects into account, we are able to show, among other things, that the Hayashi
tracks are shifted and the star's age is considerably modified.
