the activity of exerting your muscles in various ways to keep fit
"the doctor recommended regular exercise"
"he did some exercising"
"the physical exertion required by his work kept him fit"
The act by which something is exercised.
"The success of their strategy depended on the careful exercising of patience during the negotiation."
In plain English: Exercising is physical activity that makes your body stronger and healthier.
"Regular exercising helps keep your heart healthy and boosts your energy levels all day long."
Usage: This noun form is rare and often confused with the gerund; prefer using "exercise" as an uncountable mass noun instead. Avoid phrases like "the exercising of power," which sound unnecessarily formal or clunky in modern English.
present participle of exercise
"After running in the park, she felt refreshed from exercising her legs."
In plain English: Exercising means doing physical activity to make your body stronger and healthier.
"She enjoys exercising in the park every morning to stay healthy."