Fast Long Runs but a Slow 1.5 Mile: Getting to 10:30

Hi, I have recently decided to join the British Army. I will be required to run 1.5 miles in around 10 min 30sec. I have read your comments to others asking the same question, however the answer you gave them worries me slightly. E.g. "Therefore, what I recommend you do is to increase your mileage. Why? Well, just imagine you'd be able to run five miles. How easy would a 1.5 mile run be then? When increasing your mileage you increase the risk of injury, so make sure you do it safely. Also see my page about increasing mileage safely."

I myself am running just under 4 miles twice a week in 42 mins however, when I time myself at the 1.5 mile run I get around 12 mins 30 sec. As you said above, you should try to run further than say 1.5 miles each time....Well I do! My pace is much quicker than when do my 4 miles yet I am still getting a shocking time. Can you recommend any training tips to improve my pace?
Cheers Rob

Answer by Dom:
Hi Rob, thanks for your question about your 1.5 mile target time. You're already putting in good training volume with those 4 mile runs twice a week, which shows real commitment to your army preparation.

What we now need is a bit more running as well as some faster running, and you'll be in with a real chance.

Here's what needs to happen, Rob:

1. Increase your training frequency beyond twice weekly
2. Add specific speed work to complement your base running
3. Practice race-specific preparation and tactics
4. Sort out your pacing strategy for the 1.5 mile test

1. Increase Your Training Frequency Beyond Twice Weekly

Two runs per week is a good start, but it's not enough to maximize your improvement rate. Your body adapts to consistent, frequent stress, and twice weekly just doesn't provide enough stimulus.

I like to see people do at least three runs per week for some improvement. Start doing four or five and signficant and solid improvement becomes possible. I wouldn't jump from two to four runs immediately. First get comfortable with a third run. Then, after a while, add in a fourth run.

Reduce those longer 4 mile runs a little while you are adding runs. Adding runs means taking more risks, so manage your injury risk during this period. Keep those runs mostly conversational at the moment.

Easy runs are crucial. They improve your aerobic capacity, help you recover from the harder sessions, and build running-specific strength without adding excessive fatigue. Think of them as your foundation work.

Make sure you're doing proper warm-ups, cool-downs, and listening to your body. But don't let a fear of injury keep you from training adequately, because under-preparation is a bigger risk for your army career than a minor running niggle. The key principles are covered in more detail in my increasing mileage safely guide (see link above).

2. Add specific speed work to complement your base running

Your longer runs are building great aerobic capacity, Rob, but you need some faster work to develop your speed endurance, your ability to go fast for long.

When you are used to doing four runs per week, make one of those runs a faster session. For the 1.5 mile test I think a mix of intervals and tempo runs is the way to go. Intervals are generally done at about 5k pace. Tempo runs at about 10k to half marathon pace. I hear you thinking. Why do I run slower than 1.5 mile pace all the time? In short, these paces are optimal for triggering certain responses in your body. It is worth reading the background in my interval running and tempo running pages.

I am also referring you to those pages to get ideas about workouts.

When you are adding speed, like when you are adding mileage, you are increasing risk. So, manage the transitions carefully. Listen to your body and in case of any issues or niggles, back off a little.

3. Practice race-specific preparation and tactics

Your test day performance depends heavily on how well you've rehearsed the entire experience, not just the running itself.

So, make sure you have worked what you do in terms of warm-up and practice your warm-up routine in training. Learn what works for you so you don't have any hesitations on the day itself. The general recommendation is 10 minutes of easy jogging, followed by some dynamic movements (leg swings, high knees, butt kicks), then 2-3 short accelerations to get your legs feeling sharp. You can vary as you see fit. But your routine should become automatic.

Additionally, I can really recommend running some practice tests under similar conditions to your actual test. If you'll be running in boots, practice in boots. If it's likely to be early morning, do some early morning practice runs. Your body performs best when it's familiar with the conditions.

In the end, 1.5 miles is short enough that you can practice it a few times in training. It will give you a gauge of where you are at, but it will also help you get used to the mental aspects of running hard for more than 10 minutes. The 1.5 mile test is as much mental as physical. You'll be redlining almost instantly. You need to stay calm when your legs start burning around the 1 mile mark. Practice pushing through discomfort in training so it doesn't surprise you on test day.

4. Sort out your pacing strategy for the 1.5 mile test

For a 10:30 target, you need to average exactly 7 minutes per mile. That means you should hit the 0.5 mile mark at roughly 3:30, the 1 mile mark at 7:00, and then push the final 0.5 mile home.

That's the theory. Working with plenty of people preparing for their military tests, I generally advise people to start slightly conservative. Try opening your first half mile at 3:31-3:33 pace. This sets you up for a stronger finish.

So many run the first 0.5 mile way too fast. Like 3:20 or so. Then the next 0.5 mile becomes 3:40 and the last one 4:00 min. It's a challenging distance between aerobic ability and speed. The 1.5 miles is long enough that you can't sprint it. So don't try to. You need to find that sweet spot where you're working hard but not completely collapsing in the second half.

So, practice with this pace before test day. Get onto a track to find your goal pace and get used to it. This is how you'll groove the right rhythm for test day.
Hope this helps you crack that 10:30 target, Rob. With your current fitness base and these adjustments, you should start seeing improvements after the first month of training. For more army-specific training advice, check out the 1.5 mile run for army in 11 minutes article. If you are already near 10:30 and need a small gain, see running 1.5 mile in under 10:30.

And Rob, if you'd rather have a plan generated around your own numbers than work out the training load yourself, I built AceTheTest. It takes your current time, your 10:30 target and your test date, and lays out a day-by-day plan following this same base-then-speed approach. Free to start.

Best of luck with your army application, Rob. You can definitely get there.

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