Finally, the type of exercise you do is the last part of the F.I.T.T. principle and an easy one to manipulate to avoid overuse injuries or weight loss plateaus. For cardio exercise: Cardio is easy to change, since any activity that gets your heart rate up counts.
First published in 1959, this pair of meditations by the revered civil-rights leader Martin Luther King, Jr. contains the theological roots of his political and social philosophy of nonviolent activism. Eloquent and passionate, reasoned and sensitive.
Batman makes his debut. The caped crusader first appeared on May 1st, 1939. The Caped Crusader made his entrance on the US comic book scene in the monthly Detective Comics. His creator was Bob Kane, an artist and writer aiming to find a new hero to rival Superman, who had appeared the previous year. Kane did sketches of a character with wings like those of a bat and showed them to a comic book writer called Bill Finger.