What is the main difference between health-fitness and performance-related fitness?

Past activity level: wrestled and threw shot put in high school. Current activity level: walks dog at a leisurely pace, 20min a day main fitness ... 53 year old female runner who runs 4-6 days per week andwants to qualify for the boston Marathon. ... This would benefit form a 3 zone training plan, as is featurein the anaerobic ...