What are words meaning not lazy?

Antonyms for lazy, meaning "not lazy" include:

• activated
• active
• attentive
• careful
• caring

• concerned
• energetic
• fresh
• interested
• lively

• vivacious
• diligent
• hard-working
• industrious

Source: Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.