CoachingAnswer

HOW DOES TESTOSTERONE AFFECT CYCLING PERFORMANCE OVER 40?

By Anthony WalshRoadman CyclingUpdated 10 July 2026

ANSWER

Testosterone declines approximately 1-2% per year from age 30, with meaningful performance effects typically appearing after 40. Lower testosterone reduces muscle protein synthesis, slows recovery, and can decrease motivation and training tolerance. For cycling specifically, the impact shows as reduced power output, longer recovery between hard sessions, and difficulty maintaining lean muscle mass. However, the decline is not uniform — lifestyle factors including sleep quality, body fat percentage, stress, and training load significantly modulate the rate of decline. Most masters cyclists can maintain competitive performance well into their 50s and 60s through training structure, recovery prioritisation, and lifestyle management.

KEY TAKEAWAYS

Testosterone declines ~1-2% per year from age 30, but the rate varies enormously based on lifestyle factors.
Sleep quality is the single most modifiable factor — 7-8 hours of quality sleep supports testosterone production more than any supplement.
Excessive training volume without adequate recovery can further suppress testosterone — more is not always better for masters riders.
Maintaining a healthy body fat percentage (12-20% for men) supports testosterone levels; both very low and very high body fat suppress production.

WHO THIS IS FOR

IS THIS YOU?

Male cyclists over 40 noticing declining performance and recovery

Your power numbers are dropping, recovery takes longer, and you wonder how much is age-related hormonal change versus training or lifestyle factors.

Masters riders wanting to understand the hormonal side of ageing

You have heard about testosterone decline and want the evidence-based picture rather than marketing from supplement companies.

THE ROADMAN VIEW

Testosterone decline is real, but it is not the cliff-edge that the men's health industry would have you believe. Plenty of riders in their 50s and 60s perform at levels that would embarrass 30-year-olds, because testosterone is one factor among many — and the ones you can control (sleep, stress, body composition, training structure) have an outsized impact on the rate of decline.

The biggest testosterone killer for masters cyclists is not age — it is chronic sleep deprivation and relentless high-volume training without adequate recovery. You cannot out-train biology. A masters rider who sleeps 7-8 hours, manages stress, and structures training with proper recovery blocks will maintain higher testosterone levels than a sleep-deprived rider doing twice the volume.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Dr Stacy SimsExercise physiologist, researcher in sex differences in sport
Testosterone decline in male athletes is heavily modulated by training stress and recovery quality. Chronic overtraining and caloric restriction — common in endurance athletes — can suppress testosterone well below age-predicted levels. Prioritising sleep, maintaining adequate caloric intake (particularly avoiding chronic low energy availability), and including rest days are the most effective non-pharmacological strategies for supporting hormonal health in ageing male athletes.

PRACTICAL APPLICATION

DO THIS WEEK

Prioritise sleep as the primary hormonal intervention
Testosterone production peaks during deep sleep. Aim for 7-8 hours of uninterrupted sleep with consistent bed and wake times. Reduce screen exposure in the hour before bed, keep the bedroom cool (16-18°C), and avoid caffeine after early afternoon. This single change has a larger effect on testosterone levels than any legal supplement.
Structure training to avoid chronic overreaching
Masters riders need more recovery between hard sessions than younger athletes. Limit high-intensity sessions to 2-3 per week with at least 48 hours between them. Schedule a recovery week every third week rather than every fourth. Monitor morning resting heart rate and HRV — a sustained elevation in resting HR or drop in HRV signals that training load is suppressing recovery.
Maintain body composition without extreme caloric restriction
Both excess body fat and very low body fat suppress testosterone. Aim for a body fat percentage of 12-20%. Avoid prolonged caloric deficits of more than 300-500 calories per day — aggressive dieting suppresses testosterone rapidly. If you need to lose weight, do so gradually during the base phase and return to maintenance calories during build and race phases.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEAssuming performance decline is entirely hormonal and inevitable.
FIXMuch of what riders attribute to 'getting old' is actually the result of training less effectively, sleeping less, carrying more stress, or training in the same way as their 20s. Address sleep, recovery, and training structure before concluding that hormones are the sole cause.
MISTAKEUsing testosterone-boosting supplements with no evidence base.
FIXMost over-the-counter testosterone supplements (tribulus, D-aspartic acid, DHEA, etc.) have no meaningful evidence of increasing testosterone in healthy men. Save the money and invest it in a better mattress, a sports scientist consultation, or blood work to establish an actual baseline.
MISTAKEOver-training in an attempt to compensate for perceived decline.
FIXAdding more volume when performance drops is the most common response and often the worst. More training on already-stressed hormonal systems accelerates decline. The counter-intuitive fix is often to train less but smarter — fewer hours with better structure and more recovery.

FAQ

FREQUENTLY ASKED QUESTIONS

Should I get my testosterone levels tested?

A baseline blood test through your GP is reasonable for men over 40, particularly if you are experiencing fatigue, persistent poor recovery, low motivation, or significant performance decline. A total testosterone and free testosterone measurement gives you a data point. Note that levels fluctuate throughout the day — morning blood draws give the most accurate reading. Interpret results with a doctor, not Dr Google.

Does cycling itself lower testosterone?

Chronic high-volume endurance training can transiently suppress testosterone, particularly when combined with caloric restriction. This is not specific to cycling — any endurance sport with high training loads shows the same pattern. The effect is reversible with recovery. Moderate training volumes (8-12 hours per week) with adequate fuelling and recovery do not chronically suppress testosterone.

At what age should I worry about testosterone decline?

Clinically significant decline typically manifests after 45-50, though individual variation is enormous. If you are performing well, recovering adequately, and feeling good, age alone is not a reason to worry. If you notice a cluster of symptoms — persistent fatigue, declining performance despite good training, reduced motivation, and slow recovery — a blood test is worthwhile regardless of age.