exertions
n．努力，尽力：付出精力、时间或力量去完成某事。
例句
He needed to relax after the exertions of a busy day at work.
他忙碌工作了一天后需要休息。
《牛津词典》
After two days' exertions, it's the arms and hands that seize up, not the legs.
两天的劳累之后，突然发僵的是胳膊和手，并不是双腿。
《柯林斯英汉双解大词典》
Tom was panting with his exertions by this time.
这时汤姆拼命地喘着大气。
