Fitness ..has been defines in relation to a concept called physical work capacity,or how much work the body can do.Fitness can also be understood in relation to a number of components including endurance,flexibility,strength and power.You need to be fit to play sports ..
Health...,on the other hand,is a broader concept that includes being free from and resilient to disease,mental and spiritual well being,and quality of you social relationship.
Understanding the different between fitness and health is important because the level of exercise you need to be healthy is less than that need to get and keep you fit.Remember with exercise consistency is always better than intensity..any physical activity is a health gain...
There isn't a magic amount of exercise you need to do to get a benefit,the keys to make an effort and persevere.As soon as you move,you win! if you want to be healthy..