NutritionAnswer

DOES CYCLING BUILD MUSCLE?

By Anthony WalshRoadman CyclingUpdated 9 July 2026

ANSWER

Cycling builds moderate leg muscle mass in beginners during the first 6-12 months of regular riding, particularly in the quadriceps, glutes, and calves. However, cycling is an endurance activity that primarily develops slow-twitch (Type I) muscle fibres for fatigue resistance rather than hypertrophy. Trained cyclists who want to build or preserve muscle mass — especially in the upper body and after age 40 — need dedicated strength training alongside their riding. The bike maintains leg muscle; it does not build the kind of muscular development that resistance work produces.

KEY TAKEAWAYS

Cycling develops moderate quadriceps, glute, and calf muscle in beginners, but the hypertrophy effect plateaus within 6-12 months.
Endurance cycling primarily recruits slow-twitch (Type I) fibres, which develop fatigue resistance rather than size.
Upper body, back, and core muscle are not meaningfully developed by cycling — strength training is required for whole-body muscle maintenance.
Masters cyclists who do not supplement with resistance training lose roughly 1-2% of total muscle mass per year after 40.

WHO THIS IS FOR

IS THIS YOU?

The rider wondering if cycling alone is enough for fitness

You want to know whether regular cycling provides sufficient muscle stimulus to maintain overall strength and body composition without going to a gym.

The masters cyclist noticing muscle loss with age

You have been riding for years but feel like you are losing strength and muscle mass, and you want to understand why and what to do about it.

THE ROADMAN VIEW

Anthony has a clear stance on this one, informed by conversations with strength coaches and exercise physiologists across dozens of episodes: cycling builds some muscle, but it is not a muscle-building activity in any meaningful sense. When you first start riding, particularly if you come from a sedentary background, the novel stimulus of pedalling against resistance will produce noticeable quadriceps and glute development. Your legs get stronger, they get slightly larger, and they adapt to the repeated demands of turning the cranks. That adaptation is real and welcome. But it plateaus. Within a year of consistent riding, the leg muscle you are going to build from cycling alone has essentially been built.

The reason is physiological. Cycling is a repetitive, sub-maximal endurance activity. It recruits predominantly slow-twitch muscle fibres, which adapt by becoming more fatigue-resistant — more mitochondria, better capillary supply, improved fat oxidation. These are brilliant adaptations for riding 100 kilometres, but they are not the same as hypertrophy. Building muscle requires mechanical tension at high loads, muscle damage from eccentric contractions, and metabolic stress from working near failure — none of which cycling provides in sufficient dose. A set of heavy split squats imposes more muscle-building stimulus on the quadriceps in 2 minutes than an hour of pedalling at threshold.

For masters riders, this matters enormously. After 40, sarcopenia — the age-related loss of muscle mass — accelerates at roughly 1-2% per year without resistance training. Cycling does not prevent this because it does not provide the heavy mechanical loading that signals the body to retain muscle. The riders who maintain their power output and body composition into their 50s and 60s are the ones who lift twice a week. Not bodybuilding-style sessions — 30 minutes of split squats, single-leg presses, hip hinges, push-ups, and core work is sufficient. The cost is minimal; the benefit is substantial.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Derek TeelStrength coach for competitive cyclists
Cycling provides a maintenance stimulus for the muscles it uses — quads, glutes, calves — but it does not build muscle in trained athletes. For that, you need progressive resistance training with loads heavy enough to recruit fast-twitch fibres. Two 30-minute strength sessions per week are enough to preserve and even build muscle mass that cycling alone cannot maintain.
Hear it: Strength Training For Cycling Simplified | Derek Teel
Dr Andy GalpinMuscle physiology researcher
Endurance exercise and resistance exercise trigger different molecular signalling pathways. Cycling activates AMPK, which drives mitochondrial biogenesis and aerobic adaptation. Resistance training activates mTOR, which drives muscle protein synthesis and hypertrophy. Both are valuable, but they are not interchangeable. Cyclists who want muscle need resistance training alongside their riding.
Hear it: Dr Andy Galpin on Muscle After 40 | Roadman Cycling Podcast

PRACTICAL APPLICATION

DO THIS WEEK

Add two strength sessions per week targeting key muscle groups
Perform split squats, single-leg press, hip hinges, step-ups (lower body), push-ups, rows, overhead press (upper body), and plank variations (core). Use loads that are challenging for 6-10 reps over 3-4 sets. Schedule these on easy riding days or rest days to avoid interference with hard cycling sessions.
Eat enough protein to support muscle maintenance
Consume 1.6-2.2g of protein per kilogram of body weight per day, split across 4 meals of 30-40g each. This is the minimum threshold for muscle protein synthesis in endurance athletes, and the upper end is appropriate for riders over 40 whose anabolic response to protein is blunted.
Use progressive overload in strength sessions
Increase weight by 2-5% every 2-3 weeks or add an extra rep to each set. Without progressive overload, strength training becomes maintenance rather than development. Track your loads in a simple notebook or app to ensure you are progressing rather than going through the motions.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEBelieving that cycling provides enough muscle stimulus to prevent sarcopenia.
FIXCycling preserves the specific leg muscles it uses but does not load upper body, back, or core sufficiently to prevent age-related muscle loss. Resistance training is the only evidence-based intervention for sarcopenia prevention.
MISTAKEAvoiding strength training from fear of gaining bulk that slows climbing.
FIXCyclists do not gain significant muscle bulk from 2 sessions per week — the endurance training volume prevents it. What you gain is muscular resilience, injury prevention, and the ability to maintain power output as you age. Any minimal weight gain is offset by improved power production.
MISTAKEDoing only light, high-rep 'toning' work instead of meaningful resistance.
FIXSets of 20 bodyweight squats do not provide enough mechanical tension to stimulate muscle preservation. Use loads that challenge you within 6-12 reps. Split squats with dumbbells, weighted step-ups, and loaded hip hinges are more effective than bodyweight circuits.

FAQ

FREQUENTLY ASKED QUESTIONS

Why do some cyclists have big legs if cycling does not build muscle?

Professional track sprinters and some road sprinters have large, muscular legs from a combination of genetics, targeted strength training, and the high-force demands of sprint efforts. Endurance road cyclists — particularly climbers — typically have lean, smaller legs. The muscular cyclists you see have built that muscle in the gym, not exclusively on the bike.

Can cycling cause muscle loss?

High-volume cycling without adequate calorie and protein intake can contribute to muscle loss because the body may catabolise muscle tissue for fuel. This is particularly relevant during long rides in a fasted or under-fuelled state. Adequate nutrition — especially protein — and two weekly strength sessions prevent cycling-related muscle loss entirely.

Does hill climbing build more muscle than flat riding?

Climbing involves higher force production per pedal stroke, particularly at low cadence, which recruits more fast-twitch fibres than flat riding. This provides a marginally greater muscle-maintenance stimulus. However, the force is still far below what resistance training provides, so climbing alone is not a substitute for strength work.

How much muscle mass does a cyclist lose per year without strength training?

After age 40, untrained individuals lose roughly 1-2% of muscle mass per year. Endurance athletes who do not perform resistance training may lose slightly less due to their overall activity level, but the decline is still significant over a decade. Two strength sessions per week reduces this loss to near zero in most studies.

Should I strength train before or after cycling?

Ideally, separate strength and cycling sessions by at least 6 hours, or place them on different days. If you must combine them, do cycling first and strength after — the endurance session pre-fatigues the muscles, but strength adaptations are less compromised than the reverse order. The best approach is strength on easy cycling days.

Will I get slower if I gain muscle from strength training?

Cyclists who perform 2 sessions per week typically gain 1-2 kg of muscle at most over 6-12 months, and many gain less. The power benefits — stronger sprints, more sustainable climbing, better injury resistance — outweigh the marginal weight penalty for every rider below professional level. Most amateurs get faster, not slower, when they add strength work.

RELATED EPISODES

HEAR THE CONVERSATIONS

Strength Training For Cycling Simplified | Derek Teel

Dr Andy Galpin on Muscle After 40 | Roadman Cycling Podcast

The Best Exercises For Cyclists (Strength Training)