If you’re running 10ks in your 40s, you might be wondering whether you should still be chasing the PBs you set when you were younger, or if it’s time to lower the bar. While running performance does tend to decline gradually with age, turning 40 certainly doesn’t mean your fastest days are behind you. In fact, if you’ve only recently started running or become more structured with your training, there may still be plenty of room for improvement.
Knowing the average 10k time for your age can provide a useful benchmark. But rather than going full pelt in every session in an attempt to bring that number down, managing your training intensity and recovering properly is often a better route to faster times and better fitness.
What Is the Average 10K Time for Men in Their 40s?
According to Running Level, a 40-year-old male intermediate runner can expect to complete a 10k in 48:29, while for a 45-year-old that rises slightly to 50:26.
The benchmarks vary considerably depending on experience level. At age 40, Running Level lists the following 10k times:
- Beginner: 1:07:58
- Novice: 56:43
- Intermediate: 48:29
- Advanced: 42:26
- Elite: 38:01
These figures are best treated as rough benchmarks rather than targets you should be hitting. Training history, genetics, injury history and consistency can all have a significant impact on your 10k performance.
How to Run a Sub-50-Minute 10K in Your 40s
If you’re hovering just above the 50-minute mark, breaking it means averaging roughly 5:00/km (or 8:00/mile) for the full 10k.
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Coach and professional ultra-runner Lee Grantham recommends combining interval sessions with race-specific long runs, while leaving enough recovery between harder efforts to avoid injury, burnout and plateaus.
For a sub-50-minute 10k, Grantham recommends the following interval sessions:
- 24 × 250m with 60 seconds’ recovery
- 12 × 500m with 60 seconds’ recovery
- 6 × 1km with 60 seconds’ recovery
- 3 × 2km with 60 seconds’ recovery
For runners already close to the 50-minute barrier, the longer intervals should be run at roughly 10k pace, while the shorter efforts can gradually become faster. But Grantham stresses that you shouldn’t force the pace.
‘The most important part is the session is coming to us. It’s all under our control. We’re not striving for pace. We’re finishing the interval session feeling like we could do another 1 or 2 reps.’
Don’t Neglect Your Long Runs
Alongside the intervals, Grantham recommends maintaining your aerobic base with longer, steady efforts.
One of his favourite race-specific sessions is a 12km progression run, which for a 50-minute 10k target looks like this:
- 4km at 6:00/km
- 4km at 5:30/km
- 4km at 5:00/km
This allows you to practise holding goal pace on tired legs without racing the full 10k in training.
Grantham also recommends leaving several days between your interval session and your harder long run so you’re properly recovered for both.
The goal isn’t to prove you can already run a sub-50-minute 10k in training. It’s to gradually build the fitness to do it on race day.
Kate is a fitness writer for Men’s Health UK where she contributes regular workouts, training tips and nutrition guides. She has a post graduate diploma in Sports Performance Nutrition and before joining Men’s Health she was a nutritionist, fitness writer and personal trainer with over 5k hours coaching on the gym floor. Kate has a keen interest in volunteering for animal shelters and when she isn’t lifting weights in her garden, she can be found walking her rescue dog.
