strenuous

A feeling of complete and utter euphoria which peaks when climbing into bed at the end of an 18-hour workday, a long road trip or hours of extremely strenuous physical activity

n a method of athletic training (especially for runners) in which strenuous effort and normal effort alternate in a continuous exercise

carry on a fight v fight against or resist strongly v make a strenuous or labored effort v exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person

n a person trained to compete in sports n a support for the genitals worn by men engaging in strenuous exercise

past participle of jock n a person trained to compete in sports n a support for the genitals worn by men engaging in strenuous exercise