In general, the exercise guidelines set out by the American College of Sports Medicine give you a place to start when figuring out how often to workout. 1  For cardio: Depending on your goal, guidelines recommend moderate exercise five or more days a week or intense cardio three days a week to improve your health.
This Day In History: 04/04/1968 - Dr. King is Assassinated. Many historical events occurred on April 4th, and Russ Mitchell recaps them in this video clip from This Day In History. President William Henry Harrison became the first US President to die while in office when his cold turned into pneumonia.
On March 29 1968 Martin Luther King went to Memphis in Mississippi, where racism was a big problem. He came to support the black sanitary public works employees. During his visit in Memphis he got assassinated on his motel April 4 1968, he got shot with a bullet that went straight through his cheek.