How to Run 5K in 51 Minutes 10 Seconds

This is a helpful guide to understanding how to run smarter and achieve your goal pace. Bookmark this page or print it to take it along on your training runs.

1. Determine Your Pace Goal

Running a 5k in 51 minutes 10 seconds requires that your average pace is 16:28 per mile or 10:14 per km. If you want to break 51 minutes 10 seconds then your average pace has to be less than this.

 
Pace Per Mile
16:28
 
Pace Per Kilometer
10:14
 

2. Know Your Split Times

Once you know the pace you have to run, it is helpful to have an idea of what your time splits should be at each mile or kilometer. These times are based on the assumption that each lap split is run at the same pace. That isn't always possible but you will know whether you are ahead or behind your pace at each mile. Don't just default to your preferred units (miles or kilometers) - consider switching units on your GPS watch if the math is simpler to add in your head while you are running.

16:28 Per Mile Average Pace
MILESplit TimeLap Time
116:2816:28
232:5616:28
349:2416:28
3.1151:101:46
10:14 Per Kilometer Average Pace
KMSplit TimeLap Time
110:1410:14
220:2810:14
330:4210:14
440:5610:14
551:1010:14

3. Develop a Pacing Strategy

Running a consistent pace is often difficult to achieve when you consider factors such as terrain, wind, and fatigue. It may be helpful to plan for a variable pacing strategy as a better way to achieve your desired average pace. Below are two different approaches with aggressive and conservative options. Aggressive results is a larger change in pace compared to a conservative strategy.

Pacing Strategy 1: Negative Split

Negative split is running the second half of the race faster than the first. This is common for professional runners but uncommon in amateurs. The thought behind this strategy is to start easy and finish strong.

Aggressive Negative Split

16:28 Per Mile Average Pace
MILESplit TimeLap Time
117:1717:17
233:4716:30
349:3115:43
3.1151:101:38
10:14 Per Kilometer Average Pace
KMSplit TimeLap Time
110:4410:44
221:1410:29
331:2810:14
441:269:58
551:109:43

Conservative Negative Split

16:28 Per Mile Average Pace
MILESplit TimeLap Time
116:4716:47
233:1616:29
349:2716:10
3.1151:101:42
10:14 Per Kilometer Average Pace
KMSplit TimeLap Time
110:2610:26
220:4610:20
331:0010:14
441:0810:07
551:1010:01

Pacing Strategy 2: Positive Split

Positive split is running the second half of the race slower than the first. This is very common as most amateur runners will start too fast and fatigue as the race goes on. It may not be the recommended approach but some runners prefer this approach so it is an option to consider.

Aggressive Positive Split

16:28 Per Mile Average Pace
MILESplit TimeLap Time
115:3815:38
232:0416:25
349:1617:12
3.1151:101:53
10:14 Per Kilometer Average Pace
KMSplit TimeLap Time
19:439:43
219:419:58
329:5510:14
440:2510:29
551:1010:44

Conservative Positive Split

16:28 Per Mile Average Pace
MILESplit TimeLap Time
116:0816:08
232:3516:26
349:2016:45
3.1151:101:49
10:14 Per Kilometer Average Pace
KMSplit TimeLap Time
110:0110:01
220:0910:07
330:2310:14
440:4310:20
551:1010:26

4. Run

There is nothing left to do now but go for it! Remember to stick to your pacing strategy as long as possible but don't be afraid to modify things on the fly. Ultimately it may take several changes to your approach in order to achieve your goal.

5. Ready for your next 5K goal?