Decrease the intenseness of the stepper machine so his heart rate doesn't go over his target heart rate zone.
An immune disorder is a malfunction of the immune system. Immune disorders are often caused by inherited mutations or even acquired from someone else. Immune disorder can cause infections to different parts of the body and misdevelop the internal organs.
Answer:
Push Up is the best exercise to get a six pack. But you must do it daily and properly.
Adult is 30 chest compression to 2 breaths. For child its 15 chest compression to 2 breaths. For infants its the same as a child but don't use your hand its only two fingers or thumbs