参加健身的英语作文可以从以下几个方面进行撰写：

引言

简要介绍自己以及为什么选择健身。

可以提到健身的好处，如增强体质、减轻压力等。

健身方式

详细描述自己喜欢的健身方式，例如跑步、游泳、瑜伽、力量训练等。

可以分享这些运动对自己身体和心理的积极影响。

健身习惯

介绍自己每周安排几次健身，每次持续的时间。

描述自己在健身过程中的一些习惯，比如热身、拉伸、饮食等。

健身挑战与成就

分享自己曾经参加过的健身挑战，如参加马拉松比赛、完成某项体能训练等。

描述这些挑战给自己带来的成就感和满足感。

健身建议

给其他想要开始健身的人一些建议，如如何选择合适的运动方式、如何制定健身计划等。

可以提到一些常见的健身误区，并提醒读者避免。

结语

总结自己的健身经历和感受，强调健身对生活的积极影响。

鼓励读者也加入健身的行列，追求更健康的生活方式。

Example Essay: The Joy of Running

Running is my favorite sport. I find it a great way to stay fit and healthy. Every morning, I wake up early and head out for a run. The fresh air and the sound of my footsteps create a peaceful and invigorating atmosphere.

Running is not just a physical exercise； it's also a mental one. It helps me clear my mind and reduce stress. During my runs, I often think about my goals and dreams, which gives me a sense of purpose and motivation.

I've been running for several years now, and I've noticed significant improvements in my physical and mental health. My stamina has increased, and I feel more energetic and alert. Moreover, running has taught me the importance of perseverance and discipline.

Despite the challenges, such as sore muscles and sometimes feeling exhausted, I never give up. The sense of accomplishment and the joy of running make it all worthwhile. I encourage others to try running and discover its many benefits for themselves.

In conclusion, running is not just a sport； it's a way of life. It keeps me fit, healthy, and focused. I hope my story inspires you to start your own fitness journey and enjoy the many rewards that come with it.