"Some activists believe that the mismatch between Spain's clock time and solar time contributes to the country's unusual daily schedule.[9] They believe that the relatively late sunrises and sunsets shift the average Spaniard's day later than it otherwise would be, and that a return to its original time zone would help boost productivity and bring family and work rhythms into better balance.[10]"
https://en.m.wikipedia.org/wiki/Time_in_Spain#Criticism_of_t...But both Portugal and Spain are living in the wrong time zone, which is at least one hour off compared to natural solar time. So it most probably don't make a difference health wise if you move from Portugal to Spain.
