Why is exercise important to your wellness?

Which training principle states that exercising a certain body part are practicing a particular skill primarily develops that part or skill

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

During the past few weeks or months, have you noticed any exercises that have become too easy for you? do you think you need to increase the intensity in any of the three exercise areas in your workouts? evaluate your exercise progress in the three exercise areas (cardiovascular, resistance, and flexibility) and list what modifications, if any, you may need to make in your exercise routine.