Generally people like using hair masks after hitting the gym to revive their strands.
The opposite is actually more beneficial for your hair health.
“Did you know the salt from your sweat can actually dry out your hair?
If you apply [a mask] before your workout,
the ingredients push moisture
into your strands and seal it in
before the salt has a chance
to dry your hair out,”
The heat from your workout
will allow the mask the work deeper, then all you have to do
is rinse and go!”