Freebase(0.00 / 0 votes)Rate this definition: In a parliamentary or semi-presidential system of government, a reserve power is a power that may be exercised by the head of state without the approval of another branch of the government.
5k race = 3.1 miles. Most beginner runners will take an average time to finish a 5k race of 30 - 40 minutes. 10k race = 6.2 miles. The typical time it takes to do a 10k race is 1 - 1 1/2 hours. Half marathon = 13.1 miles, 21.7 kilometres. A respectable time it takes to do a half marathon is 2 - 2 1/2 hours. Marathon = 26.2 miles, 41.2 kilometres. The average time it takes runners to do a marathon is between 4 - 5 hours.
FOR MANY INDIVIDUALS, five kilometers (5,000 meters, or 3.1 miles) is the first competitive distance they try. It's their first race T-shirt, their introduction to the world of road racing. But experienced runners like 5-K's too. Five-K races are fun to run and easy to race. Unlike marathons, you don't need to spend 18 weeks training specifically for them, and recovery time is measured in days, not weeks. For that reason, the 5-K is the most popular racing distance in the United States.