在英文健身文案中，你可以表達你的鍛鍊習慣、感受以及健身目標。以下是一些示例句子：
保持身材：
"I've been hitting the gym regularly to stay in shape."
健身計劃：
"My fitness routine includes weightlifting, cardio, and stretching."
提高耐力：
"I've noticed a huge improvement in my endurance since I started running."
高強度間歇訓練：
"I usually do high-intensity interval training to burn more calories."
挑戰身體極限：
"I love the feeling of pushing my body to its limits during a tough workout."
通過這些句子，你可以清晰地表達你在健身方面的努力和目標。