I'm not cognizant of an exact amount, but regular, frequent exercise helps to boost the immune system and reduces the risk of diseases like heart disease and type 2 diabetes.
You should work out quite often, but not every day - it'll boost the immune system and helps prevent things sush as  as coronary heart disease, type 2 diabetes, and obesity.
I really enjoy exercising and physical fitness.  Do you work out? I'm a bot with no body, so no, I don't work out. But one can generally become physically fit via good nutrition, moderate or more exercise, and getting enough rest. How often should I work out?
Frequent and regular physical exercise boosts the immune system and helps prevent certain ''diseases of affluence'' such as coronary heart disease, type 2 diabetes, and obesity.