Sumo wrestling, a 2,000-year-old sport, was traditionally used to train soldiers, emphasizing that bigger is better. Sumo wrestlers, known as rikishi, or "powerful men," average a weight of 400 lb, combining muscle and fat for immense strength. To sustain their size, they consume about 20,000 calories daily. Could you handle the life of a sumo wrestler for just one day?

Key Moments:

• 01:05 - 5 a.m.
• 01:58 - 11 a.m.
• 02:23 - 12 p.m.
• 03:17 - 4 p.m.
• 03:40 - 7 p.m.