ex·er·tion 
/ɪgˈzɚʃən/ noun
plural ex·er·tions /ɪgˈzɚʃən/ noun : physical or mental effort [noncount] ▪ He was panting from the exertion of climbing the stairs. ▪ an easy sport that requires little physical exertion [count] ▪ Their exertions [=efforts] were rewarded when they won the championship.
