Can you still get faster after 40?
Masters Running
Yes. Most masters runners who ask me this have never actually trained properly, which means their ceiling is nowhere near where they think it is.
The short answer
Yes — and for most runners over 40 the gains available are large. Age-related decline in well-trained runners is roughly 0.5 to 1 percent a year through the forties, which is smaller than the improvement a typical runner gets from a first proper year of structured training. If you have never done consistent volume, real threshold work and strength training, you almost certainly have several years of improvement ahead of you regardless of age.
Two different questions
People asking this are usually conflating two things.
"Can my physiology still improve?" Yes. Aerobic capacity, threshold, running economy and strength all respond to training at 40, 50 and 60. The adaptations are slower and slightly smaller than at 25, but they are real and they are substantial.
"Can I beat my personal best from when I was 28?" That depends entirely on how well you trained at 28. If you were properly trained then, probably not — the decline is real. If you were running four times a week with no structure, no long run and no strength work, then very likely yes.
Most people asking are in the second category and do not realise it.
What the decline actually looks like
For well-trained endurance runners, performance decline is modest and roughly linear through the forties and fifties before steepening later. Broadly:
- 40–50: around 0.5 to 1 percent a year
- 50–60: around 1 to 1.5 percent a year
- 60–70: steeper, and more variable between individuals
To put that in context: 1 percent on a 40-minute 10km is 24 seconds a year. A first year of properly structured training routinely takes two to four minutes off a 10km. The training effect dwarfs the age effect for a considerable period.
Importantly, the decline is substantially slower in athletes who maintain both volume and intensity. Much of what gets labelled "ageing" is actually detraining — people gradually stop doing the hard work, and then attribute the resulting slowdown to their birth certificate.
Where the gains are for a masters runner
1. Consistency
The largest single lever, and it has nothing to do with age. A runner who trains 48 weeks a year improves; a runner who trains hard for eight weeks and then loses three to a niggle, repeatedly, does not.
Everything that protects consistency — strength work, soft surfaces, easy days that are actually easy, sensible progression — is a performance intervention.
2. Aerobic volume
If you are running 30km a week, going to 50km will do more for you than any clever session. The aerobic system responds to volume at any age.
3. Threshold work
The highest-value session type for most distance runners, and one that masters athletes tolerate well because it is hard without being violent. One properly executed threshold session a week for a year is a large intervention.
4. Strength training
Bigger returns after 40 than before it. Muscle mass and tendon quality decline with age unless loaded, and running economy improvements from strength work are available at any age.
5. Actually racing
A lot of masters runners stop racing, train alone, and slowly lose touch with what hard feels like. Getting back into the club calendar — the winter harrier races, parkrun, a trail series — sharpens you in ways solo training does not.
Coach's note
I have coached a good number of runners who set lifetime bests after 40, and the pattern is nearly always the same: they were never properly trained before. They ran a lot of moderate-effort kilometres, did no strength work, raced twice a year and tapered for a fortnight each time. Give that runner a structured year — genuine easy days, one or two real sessions a week, consistent long runs, twice-weekly strength — and the improvement is often dramatic. The question is almost never "am I too old". It is "have I ever actually trained".
What to expect, realistically
| Your background | Realistic first-year gain |
|---|---|
| New to structured training | Large. 5–10% over a 10km is common. |
| Trained consistently for 2–3 years | Moderate. 1–3%. |
| Long-term well-trained runner | Small or flat. Holding steady is a win. |
| Returning after years off | Large, and quicker than you expect. |
Age grading is worth knowing about
Age-graded scoring compares your time to the world best for your age and sex, giving you a percentage. It lets you compare your performance now against your performance at 30, and against runners of any age.
Many masters runners find their age-graded percentage is improving even while their raw times slowly decline. That is a genuine performance improvement and it is worth measuring, because raw times alone will eventually tell you a discouraging and incomplete story.
If you want a year that produces something
- Months 1–3: Build consistency and volume. One threshold session a week. Start strength work — twice weekly, heavy, single-leg and calf focus.
- Months 4–6: Add a second quality session. Race the winter calendar unrested.
- Months 7–9: Build to a goal race. Keep the strength work going.
- Months 10–12: Race, recover properly, then start again from a higher base.
Nothing exotic. Done for three consecutive years, this changes what you are capable of.
The one thing that will slow you down fastest
Deciding in advance that you are too old, and training accordingly.
The runners who decline quickest are the ones who quietly drop the intensity — the intervals become tempo, the tempo becomes steady, the long run becomes a jog. Within two years everything is one moderate pace and the times have gone backwards considerably faster than the age curve predicts.
Recover more. Space the hard days out. Do the strength work. But keep the hard sessions hard. That is the whole strategy, and it works for a very long time.
