حاسبة وتيرة الماراثون – خطط لسباق 42.2 كم

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• The marathon distance of 42.195 km was set at the 1908 London Olympics — the extra distance was added so the race could start at Windsor Castle and finish in front of the royal box.
• Kenya and Ethiopia dominate marathon running: athletes from these two countries hold virtually all major marathon world records and titles.
• "Hitting the wall" — the sudden fatigue at around mile 20 (32 km) — occurs when muscle glycogen is depleted and the body must switch to fat as fuel, a much slower energy pathway.