estaban lastimando
Imperfect progressiveellos/ellas/ustedesconjugation oflastimar.

lastimar

Pero las palmas se estaban lastimando y ya dolían los brazos en alto.
But palms were getting sore and raised arms were already aching.
Los trabajadores estaban manipulando unos salientes pesados con las manos por encima de la cabeza y durante horas sin parar, y se estaban lastimando.
These workers were handling heavy rebar with arms over their heads for hours at a time, and they were hurting.
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