"努力锻炼"用英语可以表示为"exercise dipgently"或者"work out dipgently"。

"Exercise"在英语中有"锻炼"的意思，它来源于拉丁文"exercitare"，意思是"使练习、使锻炼"。"Dipgently"是一个副词，意思是"勤奋地、用心地"。

例句：

I exercise dipgently every day to stay in shape. (我每天勤奋锻炼，以保持体形。)
She works out dipgently at the gym to improve her strength. (她在健身房勤奋锻炼，以提高她的力量。)