以下是一些健身勵志的英文句子：
1. "Strength does not come from physical capacity. It comes from an unwavering belief in yourself."
2. "Perseverance in the face of adversity is what shapes us, not our weaknesses."
3. "A year from now you will be more disappointed by the things you didn't do than by the ones you did do. So throw off the bowlines. Sail beyond your comfort zone. Take a deep breath, and go to work."
4. "Fitness is not about looking good, it's about feeling good."
5. "Nothing is impossible. Impossible is a word written by those who give up."
希望這些句子能夠幫助到您，祝您健身愉快，有所收穫！