"He is becoming increasingly healthy" 是表达这个意思的常用说法。
"Increasingly" 是副词，意思是"越来越"。
"Healthy" 是形容词，意思是"健康的"。
例句：
"He has been exercising regularly, and it shows - he is becoming increasingly healthy."
他一直定期锻炼，这很明显 - 他变得越来越健康了。
"She noticed that her grandfather was becoming increasingly healthy after switching to a plant-based diet."
她注意到祖父在改吃植物性饮食后变得越来越健康。
"The patient's condition has been improving steadily, and he is becoming increasingly healthy."
病人的状况一直在改善，他变得越来越健康了。