5 components of fitness are flexibility, body composition, muscular strength, muscular endurance, and cardio respiratory endurance. The 5 components are exercise activities that are health related. Cardio respiratory endurance can improve by applying the FITT principle because it keeps your heart rate up. The maximum of your heart rate is 60% of your max heart rate. The digestive between aerobic and anaerobic is that Aerobic refers to your body using oxygen to produce energy while Anaerobic means your body producing energy without oxygen. The 5 levels of intensity is daily activity, base, heart health, & media/seat.
Hope it helps :).