年轻力壮

Explanation: Strong: strong. Young, physically strong. 　　Usage: Joint type; as the predicate attribute; describe the young 　　Source: Luo Binji "the voice of thousands of people under the tower": "I immediately walked over, because I am young and strong." Thesaurus:  in the prime of one’ s life, in good feather, Strong body and strong Antonym Group:  decrepit be stricken in years, Oldness Lishuai