Skip to content
CoachingAnswer

WHY AM I SLOWING DOWN AS I AGE?

By Anthony WalshRoadman CyclingUpdated

WHO THIS IS FOR

IS THIS YOU?

The rider who's noticed their power dropping year on year

You're training consistently but each season your numbers are slightly lower than the last.

The masters rider who's never lifted weights

You've been cycling-only for years and wondering why recovery feels harder.

THE ROADMAN VIEW

The Roadman view

The honest picture of aging and cycling has two parts. Part one is real and not fully reversible: VO2 max falls, fast-twitch fibres shrink and disappear, recovery takes longer. Anthony has unpacked this with Andy Galpin and Joe Friel on the podcast, and neither of them sugar-coat it — the physiology changes, and the change accelerates through the 50s.

Part two is where most riders lose unnecessary ground. Grey-zone riding that never gets easy enough to recover from. No strength work, so the fast-twitch fibres that cycling barely touches just disappear. Recovery gaps that are too short because you're comparing yourself to the training you did at 32. Fix those and you don't stop declining — but the rate drops sharply and there are still gains to be had.

Andy Galpin's research on fast-twitch fibre loss is particularly useful here. After 40, the fibres responsible for snap and power go first. Cycling, being a low-force repetitive motion, barely stresses them. Strength training is the direct intervention — and without it, the fastest-declining part of your physiology gets no stimulus to hold on.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

  • Andy GalpinProfessor of Kinesiology, Cal State Fullerton; muscle physiologist

    Fast-twitch muscle fibres are disproportionately lost with age, and endurance exercise alone does almost nothing to preserve them. Structured resistance training — with meaningful load — is the direct stimulus needed to slow that decline and maintain the power that cycling depends on.

    Hear it: The Science Of Getting Faster After 40 | Dr Andy Galpin
  • Joe FrielAuthor of Fast After 50 and The Cyclist's Training Bible

    Decline after 40 is partly biological and partly a training error problem. The two are often conflated — riders blame age for what is actually recoverable through better structure, adequate recovery, and consistent strength work.

    Hear it: The Training Secret To Going FASTER After 40 | Joe Friel

PRACTICAL APPLICATION

DO THIS WEEK

  1. Audit your intensity split this week

    Pull your last 14 days of ride data. Colour every ride by zone. If your easy rides are sitting in zone 3, slowing them is your first intervention — easier than any training block.

  2. Start strength training now — two sessions a week

    Split squats, hip hinges, single-leg deadlifts, press. Meaningful load, 6–10 reps, progressed over time. This is the highest-impact intervention a masters rider who doesn't lift can make for fast-twitch preservation.

  3. Add two easy days between hard sessions

    Recovery capacity at 50 is roughly 25–50% lower than at 30. Two easy days between hard efforts is the default, not the exception. Running hard sessions back-to-back compounds fatigue and undermines adaptation.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

  • MISTAKEAttributing all performance decline to age and accepting it.

    FIXCheck training structure first. Grey-zone riding, no strength work, and inadequate recovery cause far more slowing than unavoidable biology.

  • MISTAKESkipping strength work because cycling is your sport.

    FIXCycling doesn't stress fast-twitch fibres sufficiently to preserve them. Without two structured strength sessions a week, that fibre is just disappearing.

  • MISTAKETraining with the same recovery gaps as you did in your 30s.

    FIXRecovery takes longer after 40. Build in an extra easy day between hard efforts and a full deload week every third or fourth week.

FAQ

FREQUENTLY ASKED QUESTIONS

How much slower do cyclists get with age?
VO2 max drops roughly 1% per year from 40, and power declines follow a similar curve — faster in the 50s and 60s than in the 40s. But structured training narrows this significantly, and many riders offset years of decline by fixing structural training errors.
Is VO2 max decline inevitable after 40?
The decline is real and partly unavoidable. But the rate is modifiable — consistent VO2 max interval training slows the ceiling drop, and structured masters athletes decline far more slowly than sedentary peers.
What happens to muscle after 40 in cyclists?
Cyclists lose fast-twitch muscle fibres disproportionately because cycling barely recruits them. Without resistance training, the power-generating fibres that produce sprint and high-intensity capacity decline fastest.
Can I reverse performance decline after 50?
You can't fully reverse it, but you can slow it substantially and, from an under-structured baseline, still improve absolute performance. Many riders set lifetime best watts per kilo in their early-to-mid 50s after fixing training structure.
Does sleep affect cycling performance more as I age?
Yes. Recovery quality — and sleep is the main driver of it — matters more after 40 because the recovery window is already shorter. Under-sleeping a hard session blocks the adaptation entirely in a way it doesn't as readily at 28.
Should older cyclists do more or fewer intervals?
Fewer, better ones. Two properly executed hard sessions a week beats four moderate efforts. Quality over quantity is the masters prescription — and the intervals that matter most are VO2 max work to slow the ceiling decline.

RELATED EPISODES

HEAR THE CONVERSATIONS

RELATED TOPICS

STILL GUESSING?

A coach removes the guesswork.

Apply for Coaching