When you have no choice but to sit, try switching the slouch  for a straighter spine, and when you don't have  to be bound to your seat, aim to move around much more, perhaps by setting a reminder to yourself to get up every half hour.
Cuando no tengas  más remedio que sentarte, trata de cambiar la postura desgarbada  a una columna vertebral recta, y si no tienes que estar  atado al asiento, intenta moverte mucho más, tal vez con una alarma para recordarte  que debes levantarte cada media hora.