Boxing for fitness will help improve your heart rate, which strengthens your heart muscle. Interval training, such as working on the heavy bag, mitt training, and calisthenics helps to increase your endurance and your cardio fitness.
Boxing for fitness training, also helps to strengthen the muscles of your arms, back, legs, and in-particular your core. STRONG CORE STRONG BODY!!!!
Boxing or Fitness helps lower blood sugar levels (glucose), and improve insulin resistance.