Considering a 5K: Don't Know How to Train Properly

I am a 45-year-old male who started running last June. I'm now in January and up to runs of 4–6.5 miles. Over those 8 months I lost 75 pounds. I want to run my first 5k this coming June and don't know where to go from here. I average 9–9.5 min/mile and always run outside. Any help would be appreciated.

– Tom, Delhi NY

Answer by Dom: Tom, 75 pounds in 8 months through consistent outdoor running — that's a remarkable change in your life, and you deserve to feel good about it. You've already built the most important thing: a real habit. Your 4 to 6.5 mile runs at 9 to 9:30 per mile give you an excellent base for a 5k, and with five months until your June race you have plenty of time to prepare properly. Here is how I'd structure it, with specific paces and session types at each stage.

1. Keep building the base through February
2. Add quality sessions from March
3. Race week taper and your first 5k goal

Keep Building the Base Through February

Don't change anything yet. What you're doing right now — consistent outdoor running, several days a week — is the most important phase of your preparation. The quality sessions you'll add from March only work if this base is solid underneath them. Skip the base and go straight to intervals, and you'll get injured. That's not a guess — it's the most common mistake first-time racers make.

What I would do over the next six weeks is gradually push your longest run to 8 or 9 miles. You don't need to run all your outings further — just extend one per week. And keep that long run genuinely easy: 10:00 to 10:30 per mile is right. It should feel comfortable, not heroic. If you're breathing hard enough that conversation is difficult, slow down. This type of slow, easy, longer running is the single most important foundation for racing well. See the base running drills page for more on why it matters so much.

Running outside in January and February builds toughness too — adjusting pace for wet pavement and cold air makes you a more adaptable runner. Just watch your footing on ice and don't be too proud to slow right down in poor conditions. Better to finish a run than to spend two weeks on the sofa with a turned ankle.

Adding Quality Sessions from March

From March — roughly three months before your June race — add two quality sessions per week. One tempo run and one interval session. These are the sessions that make you faster. Here is exactly what each looks like for a runner at your level:

Tempo run: Run 20 to 25 minutes at 8:15 to 8:30 per mile — a "comfortably hard" effort where you can say a few words but not hold a full conversation. This is your lactate threshold pace, and it's the single most effective training stimulus for 5k performance. Start at 20 minutes and build by 2 to 3 minutes per week until you reach 30 minutes by May. Warm up with 10 minutes easy before you start, and cool down with 10 minutes easy afterwards. See the tempo running page for more detail on this type of session.

Interval session: 6 repetitions of 400 metres — one lap of a track if you have access to one, or roughly 90 seconds of running — at around 8:00 per mile pace. Take 90 seconds of easy jogging between each effort. As your fitness improves, increase to 8 repetitions, then progress to 800-metre repeats. These shorter, faster efforts build leg speed and teach you what it feels like to run hard when you're tired — exactly what you need for the final kilometre of a 5k. Check the interval running page for more session ideas.

Two rules that matter enormously here. First: never do two quality sessions on consecutive days. Hard session, easy day, hard session — that rhythm is non-negotiable. The recovery between hard efforts is when you actually get faster; skip it and you just accumulate fatigue. Second: start both sessions conservatively in the first two weeks. Faster running carries a higher injury risk than easy running. Build into it sensibly.

Race Week, Taper, and Your First 5K Goal

In the final week before your race, cut your total mileage by roughly half. You want to arrive at the start line feeling sharp and fresh — not flat from too much rest, and not tired from training too hard. Here is how I'd structure race week:

• Monday or Tuesday: One short quality session — 3 repetitions of 400 metres at race pace (see below), with 90 seconds easy between each. That is all. About 3 miles total including warm-up and cool-down.
• Wednesday and Thursday: Easy runs of 20 to 25 minutes at a comfortable pace. Legs ticking over, nothing more.
• Friday: Rest, or a 15-minute gentle walk.
• Saturday (race day): 5 to 10 minutes of easy jogging before you get in the start corral. A few short strides — 20-second accelerations — to wake the legs up. Then race.

On the subject of your race goal: at 9:00 to 9:30 per mile for easy runs, a realistic first 5k target is 29 to 31 minutes — that's 9:20 to 10:00 per mile. If your tempo sessions go well through April and May and you're comfortably holding 8:30 pace for 25 minutes, 28 minutes is achievable. Don't be in a rush to set a specific time — see how training goes, and let that guide your race-day target.

For the race itself: start at goal pace, not faster. The atmosphere and adrenaline will tempt you to sprint the first 500 metres — resist it. Settle into your target pace early, run consistently through the middle miles, and push the final kilometre. Finishing strong feels far better than struggling through the last mile having gone out too hard.

Five months of consistent, structured training will get you to that start line in genuinely good shape, Tom. Trust the process — and well done on everything you've already achieved.

Kind regards,
Dom

Frequently Asked Questions

What pace should my tempo run be if I run easy at 9:30 per mile?

For a runner whose easy pace is around 9:30 per mile, tempo pace is typically 8:15 to 8:30 per mile — comfortably hard, where you can say a few words but not hold a full conversation. Start with 20 minutes at this effort and build to 30 minutes over 8 to 10 weeks. If it feels genuinely hard on a particular day, ease off slightly — the pace is a guide, not a rule.

What does an interval session look like for a 9:30 per mile runner?

A good starting point is 6 repetitions of 400 metres at around 8:00 per mile pace — faster than tempo, but controlled — with 90 seconds of easy jogging between each effort. Always include 10 minutes of easy running as a warm-up and cool-down. As fitness builds over weeks, increase to 8 repetitions, then progress to 800-metre repeats at the same intensity.

What is a realistic 5k goal time for a 9:30 per mile runner?

With five months of structured training, a realistic target for your first 5k is 29 to 31 minutes. If tempo work is going well by May and you're comfortably holding 8:30 pace for 25 minutes, 28 minutes is achievable. For a first race, enjoying it and finishing strong matters as much as the clock — you'll have future races to chase a specific time.

How far in advance should I taper before a 5k race?

For a 5k, one week is enough. Cut your total mileage by roughly 50 percent, keep one short quality session early in the week, and run easy for the remaining days. You want to feel light and sharp at the start line — not flat from too much rest, and not tired from squeezing in extra training. Trust the work you've already done.

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