- Martial arts fitness can increase a person’s strength, stability, stamina, flexibility and explosive power. Calasanz Martial Arts demonstrations of strength and conditioning, using board breaks to display fight strength and flexibility. The Calasanz Karate, Kung Fu, Kickboxing, Boxing and physical Arts system in Norwalk, Connecticut, believes it can change your life. Calasanz Says: I believe Martial Arts offers something important to everyone on the planet- the chance to be the very best you can be. No matter what age you are...no matter what physical shape you are in... Martial Arts can transform your life.  Show less