Being physically fit is comprised of 3 categories: strength, flexibility and endurance.
Strength comes from working muscles. The stronger your muscles are, the more stable your joints will be.
Flexibility comes from stretching. The looser your muscles are, the less likely you will be to injure yourself.
Endurance comes from doing cardio-vascular exercise, or aerobic exercise. The better your endurance, the more activity you will be able to do without becoming fatigued. Continue reading What Types Of Exercise Builds Strength?