Vigorous (adjective)

1. Full of energy, life, and activity.
2. Having or showing a strong and healthy body, mind, or spirit.
3. Done with a lot of energy and determination.

Origin:

Late 16th century (in the sense "full of life"): from latin vigorosus, from vigeō be lively.

Examples:

1. She had a vigorous workout at the gym.
2. The baby was born with a vigorous cry.
3. The old man still had a vigorous mind.
4. The company is pursuing a vigorous expansion strategy.
5. The dog had a vigorous tail wag.