exertion
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.”
“Sweat, from the exertion of hacking through the weeds clawing at Thursby’s bungalow, is running down his face.”
“I tried to help them see that when it comes to reading, similar to physical exercise, the most benefit comes with the most exertion.”