exertion
n. C1 Advanced US //ɪɡˈzɝʃən// UK //ɛɡzˈɜːʃən// ex·er·tion
n. the act of using a lot of physical or mental effort. It is the feeling of working hard to achieve something.
n. the act of applying force or effort; the state of being physically or mentally active. Often used in medical contexts to describe the degree of physical activity.
The long hike required a lot of physical exertion.
After a day of intense mental exertion, the students felt exhausted and ready for bed.
The doctor monitored the patient's heart rate during the exertion to ensure the new medication was not causing any undue strain on his cardiovascular system.