A 25-minute 5K at a speed of 12.5 mph is equal to 220 metres per minute or 4 kilometers per hour. To cover the same distance in half the time, you would need to run at a speed of 8 mph and complete the race in 25 minutes. If your goal is to reach a more challenging pace, try running for 30 minutes instead of 25 minutes on your treadmill.
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