strenuous
/ˈstrɛnjuəs/
characterized by or performed with much energy or force
中文释义：费力的；艰苦的；剧烈的
Strenuous exercise can improve cardiovascular health if done regularly.
定期进行剧烈运动可以改善心血管健康。
The hikers faced a strenuous climb up the mountain.
徒步者面临一次艰苦的登山攀爬。