The Roman History: The Gallic History (VII)

The Gauls filled themselves to repletion with wine and other luxuries, being intemperate by nature, and inhabiting a country which yielded only cereals, and was unfruitful and destitute of other productions. Thus their large bodies became delicate, distended with fatness, and heavy by reason of excessive eating and drinking, and quite incapable of running or hardship; and when any exertion was required of them they speedily became exhausted by perspiration and shortness of breath.