Keep up

1- Keep (sb) up : Not let someone go to bed

2- Keep up with sb/sth :  Do whatever is necessary to stay level or equal with that person or thing

• Examples in context:

1. Despite Spain’s reputation for civilised Mediterranean drinking habits, “the big bottle” leaves city centres full of rubbish, and residents, who have been kept up all night, furious.
2. In an information-saturated society, writes sociologist Orrin Klapp, we suffer anxiety, since the slow horse of our comprehension is unable to keep up with the fast horse of the information that we can access.

1- Mantener a alguien levantado/despierto
2- Avanzar al mismo paso (que alguien), no quedarse atrás

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