IPA: /ɪɡˈzɜːrʃənl/
KK: /ɪɡˈzɜrʃənl/
Related to physical effort or activity that requires energy and strength.
The doctor advised him to avoid exertional activities until he fully recovers.
Exertional → It is formed from "exert" (from Latin "exertus", meaning to put forth or apply) and "-ional" (a suffix used to form adjectives meaning relating to). The word "exertional" refers to something that relates to the act of putting forth effort or energy, especially in physical activity.
Think of 'exerting' effort — that's why 'exertional' means relating to the effort you put forth.