Breakdown of Me duele la columna cuando me agacho.
me
to me / myself (reflexive) / me (direct object)
doler
to hurt
cuando
when (not in questions)
la columna
the spine (backbone); the column (pillar)
agacharse
to bend down, to crouch
Elon.io is an online learning platform
We have an entire course teaching Spanish (Spain) grammar and vocabulary.