One of the most common questions I get from athletes in their 40s and 50s is some version of: "Is my score normal for my age?" or "Am I still improving or just getting slower?" The honest answer requires understanding what actually happens to aerobic fitness as you age — and the news is both better and worse than most people expect.
What Happens to VO2 Max With Age
VO2 max — the measure of aerobic capacity that the beep test estimates — peaks in the mid-to-late 20s for most people and then declines at a rate of roughly 1% per year from about age 30. This is not a sharp cliff. It is a gradual, predictable decline that accelerates slightly in the 50s and beyond.
In practical terms: a man who scored level 10 at age 25 might score level 9 at age 35, level 8 at age 45 and level 7 at age 55, assuming the same level of training and general activity. These are approximations — individual variation is enormous — but the direction is consistent.
What slows the decline dramatically is maintained aerobic training. Physically active people in their 40s and 50s can have VO2 max values comparable to sedentary people 20 years younger. The decline is real, but it is heavily influenced by whether you keep training. The research on master athletes — competitive athletes over 40 who continue training seriously — consistently shows much smaller performance declines than in the general population.
What a Good Score Looks Like Over 40
The score tables on this site provide full age-specific norms, and they are the right reference point. Comparing a 47-year-old's score against 25-year-old norms is not useful. Comparing it against 45-to-49-year-old norms tells you something meaningful.
Age 40–44 (Male)
Level 9 or above puts you in the Very Good to Excellent bracket for this age group. Level 7 is a solid, healthy result.
Age 40–44 (Female)
Level 8 is an excellent result for a woman in her early 40s. Level 6 is a good healthy baseline.
Age 45–49 (Male)
Level 8 is Very Good for this age group. Level 10+ represents exceptional aerobic fitness for a man approaching 50.
Age 50+ (Male/Female)
Maintaining level 7 or above past 50 with consistent training is an excellent fitness outcome. Use the full score tables for precise norms.
Why Recovery Matters More as You Age
The most important change in training for beep test performance over 40 is not the fitness work itself — it is the recovery between sessions. Older athletes do not recover from hard sessions as quickly as younger ones. The protein synthesis that rebuilds muscle after intense exercise slows. The nervous system takes longer to return to baseline after maximal efforts. Inflammation from hard sessions lingers longer.
Practically, this means:
Trying to do three hard shuttle sessions per week in your 40s, which is an appropriate volume for a fit 25-year-old, will typically lead to accumulated fatigue within 2 to 3 weeks. Performance plateaus or regresses. Motivation drops. The sessions feel harder without producing better results.
The adjustment is to allow more recovery between hard sessions — 48 to 72 hours minimum rather than 24 to 48 — and to replace one of the intensity sessions with a longer, easier aerobic run. Two hard sessions per week with one longer recovery run tends to work well for athletes over 40.
Training Changes That Work Over 40
The fundamentals of beep test training do not change with age. You still need interval work at or above your current maximum level. You still need aerobic base work. You still need to practice the turn and pacing. What changes is how you manage the load.
Extend the warm-up. Cold muscles are more injury-prone at any age, but significantly more so over 40. 10 to 15 minutes of progressive jogging and dynamic stretching before any interval session is not optional. Injuries that sideline training for 2 to 4 weeks are far more costly to your progress than a longer warm-up is.
Prioritise sleep. The hormonal environment during sleep is when aerobic adaptations consolidate. Consistently getting 7 to 8 hours of sleep produces measurably better training responses in older athletes than training harder on less sleep.
Accept a longer preparation timeline. A fit 25-year-old might improve significantly in 4 to 6 weeks of targeted training. An athlete over 45 will likely need 8 to 12 weeks to see equivalent improvements. This is not a failure — it is physiology. Build in the extra time before any test date.
Manage your total load. If you are playing a sport, doing gym work and attempting to improve your beep test simultaneously, something will give. Over 40, the total training load that produces adaptation without breakdown is lower than it was at 25. Prioritise and sequence rather than trying to do everything at once.
Should Over-40s Train Differently for the Beep Test?
The method is largely the same. The volume, intensity and recovery ratios need adjustment. The 6 week training plan on this site remains the right framework — but athletes over 40 should consider running an 8 to 10 week version, adding an extra recovery week between weeks 3 and 4 and extending the easier aerobic sessions rather than increasing the hard session volume.
Strength training — particularly single-leg work, hip stability and calf strength — becomes increasingly relevant for older beep test candidates. The repeated turn and acceleration demands of the test put significant load on the ankles, knees and hips. Injury prevention through strength work is a more efficient use of training time over 40 than an extra interval session that risks breakdown.
The Bottom Line
Yes, your beep test score will likely be lower at 45 than it was at 25, even with consistent training. That is expected and normal. The relevant question is not how you compare to a 25-year-old — it is how you compare to other fit, active people your age, and whether you are moving in the right direction.
A 48-year-old who scores level 9 on a properly administered beep test has exceptional aerobic fitness by any meaningful standard. That score puts them in the top few percent of their age group globally. Context and the right reference point are everything.