The phrase "a case of exercising" is correct and usable in written English.
It can be used to refer to a specific instance or example of engaging in physical activity or practice.
Example: "This is a case of exercising one's right to free speech during the protest."
Alternatives: "an instance of exercising" or "a situation of exercising".
We report a case of prolonged exercise-induced rhabdomyolysis (ER) in an otherwise healthy male malignant hyperthermia susceptible (MHS) individual.
It was not a case of formal power, exercised by a top-down approach, but a series of micro-powers spread at an everyday level, able to establish themselves in society and in the forms of culture and knowledge (Foucault 1977).
Mandatory sentencing laws prevent judges from taking into account all the circumstances of a case and exercising discretion over the punishment.
"We think this is a classic case of exercise-induced bronchial asthma".
Examining information on illnesses in marathons since 1985, Dr. Martin and Dr. Tim Noakes of the University in Cape Town in South Africa, write in the advisory statement, "It has been difficult to find any studies in which dehydration has been identified as the sole important causative factor in even a single case of exercise-related heatstroke".
Note that the inequality proved by Hedman is a particular case of Exercise 5.
Trump called the driver of the car that killed counterprotester Heather Heyer, 32, and injured 19 a "disgrace to himself, his family and the country," but he stopped short of declaring the action a case of "domestic terrorism," calling that an exercise in semantics.
That exercise was clearly a case of trying to lure George W. Bush back in from the ledge.
We present a case of severe chronic hypotension who underwent dynamic exercise testing before and after renal transplantation, with marked differences in blood pressure response to exercise.
Counsel for the appellant argued that this was not a case of an decision reviewable on ordinary administrative law grounds, but rather a case where the exercise of the power depended "upon the precedent establishment of an objective fact".
