What is the definition of Fitness Infection?

A "fitness infection" is like a bad case of the fitness spa going haywire, where your body's natural defense systems get overwhelmed by the latest fad diet, workout trend, or fitness gadget. Imagine this: "After a week of obsessively following the '30-day plank challenge', my gut microbiome decided to break out in a rash of 'fit' bacteria, causing my daily workouts to turn into an awkward, slow-moving ballet."