What happens when you suddenly stop exercising?

Just two weeks of inactivity is all it takes to reduce muscle mass and produce metabolic changes that could lead to an increased risk of developing chronic diseases, obesity experts warn. 

In a study of young, healthy adults with a mean BMI of 25, UK researchers have found that switching from moderate-to-vigorous activity to near-sedentary behaviour for just 14 days raises the risk of type 2 diabetes, heart disease and even premature death.