这个表达方式是 "He consistently exercises his grandfather."
来源：这是一个英语的固定短语，语法正确，通常用于描述一个人做某件事情的一贯坚持性。
一些例句：
He consistently exercises his grandfather to maintain good health.
Despite his busy schedule, he consistently exercises his grandfather every day.
中文翻译：
他一直坚持锻炼他的爷爷以保持良好的健康。
尽管他的日程很忙，他还是每天坚持锻炼他的爷爷。