During this covid pandemic when more people are working from home, with travelling time saved, I see more people in the park, exercising and cycling 
From what I have learnt in Nutritional Immunology and Exercise Science, exercising and over-exercising can be different though.
Regular exercise can help in our weight management, release stress, prevent chronic diseases, as well as can enhance our muscle 
, bone and joint health. However over-exercise can cause rapid production of free radicals in our body. The oxidation can cause stress to our body. This can result in poor functioning of our immune system instead 
