NutritionAnswer

HOW MUCH PROTEIN DO CYCLISTS NEED PER DAY?

By Anthony WalshRoadman CyclingUpdated 10 July 2026

ANSWER

Endurance cyclists need 1.2-1.6 g of protein per kilogram of bodyweight per day — significantly more than the 0.8 g/kg general population guideline. Masters riders (over 40) and those combining cycling with resistance training need 1.6-2.2 g/kg to offset anabolic resistance and support muscle repair. Research by Dr Stuart Phillips at McMaster University shows that spacing protein across 4 meals of 0.3-0.4 g/kg maximises muscle protein synthesis. For a 75 kg rider, that translates to 25-30 g per meal, four times per day.

KEY TAKEAWAYS

Endurance cyclists need 1.2-1.6 g/kg/day protein — 50-100% more than sedentary adults.
Masters riders and those doing strength work need 1.6-2.2 g/kg/day.
Distribute protein across 4 meals of 0.3-0.4 g/kg for maximum muscle protein synthesis.
A 75 kg cyclist needs 90-165 g total daily protein depending on age and training load.

WHO THIS IS FOR

IS THIS YOU?

The carb-focused rider

You prioritise carbohydrates for performance but are not sure whether you are getting enough protein for recovery and muscle maintenance.

The masters cyclist

You are over 40 and want to know the specific protein requirements for maintaining muscle while training.

The plant-based cyclist

You follow a vegetarian or vegan diet and want to ensure your protein intake meets endurance training demands.

THE ROADMAN VIEW

Cyclists obsess over carbohydrates — and they should, carbs fuel the work. But protein is what rebuilds the machine that does the work. Undershoot on protein and recovery suffers, muscle mass erodes, immune function drops, and you arrive at the next session less capable than you were at the last.

The mistake most riders make is backloading protein into one large evening meal. A 50 g steak dinner is less effective than four meals of 25-30 g each spread across the day. Muscle protein synthesis has a ceiling per meal — roughly 0.4 g/kg for riders over 40 — and eating beyond that ceiling in one sitting does not make up for missing it at breakfast and lunch.

Practical targets for a 75 kg rider: 25-30 g at breakfast (Greek yoghurt with nuts, or eggs on toast), 25-30 g at lunch (chicken salad, or a substantial bean-based meal), 25-30 g at dinner, and 20-25 g as a post-ride or evening snack. That lands you at 100-115 g — well within the endurance range and plenty for recovery.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Dr Stuart PhillipsMuscle physiology researcher, McMaster University
Muscle protein synthesis in endurance athletes is maximised at approximately 0.3 g/kg per meal for younger adults and 0.4 g/kg per meal for adults over 40. Distributing daily protein across 4 feedings rather than concentrating it in 1-2 meals results in 25% greater daily muscle protein synthesis.
Prof Asker JeukendrupSports nutrition researcher, founder of Mysportscience
Endurance athletes have elevated protein requirements beyond sedentary populations because exercise increases muscle protein turnover, amino acid oxidation during exercise, and the need for structural repair. The 1.2-1.6 g/kg range covers most endurance training demands; concurrent strength work pushes the requirement towards 1.6-2.0 g/kg.

PRACTICAL APPLICATION

DO THIS WEEK

Calculate your daily protein target
Multiply your bodyweight in kg by 1.4 (general endurance) or 1.8 (masters/strength). For a 75 kg rider: 105 g (endurance) to 135 g (masters). Divide by 4 meals to get your per-meal target.
Audit your current intake for three days
Use a free app (MyFitnessPal, Cronometer) to track what you actually eat for three days. Most cyclists are surprised to find they eat 30-40% less protein than they think. Identify the meal where the gap is largest — that is where to make the first change.
Fix the weakest meal first
For most riders, breakfast is the protein gap. Adding 200 g Greek yoghurt (20 g protein) or two eggs (12 g protein) to a carb-heavy breakfast immediately closes the deficit.
Include protein in the post-ride window
Consume 20-30 g protein within 2 hours of finishing a hard ride. A recovery shake (whey or plant-based protein mixed with milk or water) is the most convenient option. Whole food works equally well if appetite allows — chicken, eggs, or a substantial yoghurt.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEEating all daily protein in one large evening meal.
FIXDistribute across 4 meals. Muscle protein synthesis is a per-meal phenomenon with a ceiling — one large dose does not compensate for missing multiple smaller doses throughout the day.
MISTAKEAvoiding protein on rest days.
FIXMuscle repair and adaptation continue for 24-48 hours after hard training. Rest-day protein needs are similar to training-day needs. Do not cut protein just because you did not ride.
MISTAKERelying on protein bars as a primary source.
FIXMany protein bars are heavily processed with added sugars. Whole food sources — eggs, Greek yoghurt, chicken, fish, legumes, tofu — provide superior amino acid profiles and additional micronutrients.

FAQ

FREQUENTLY ASKED QUESTIONS

Do I need protein supplements?

Supplements are not necessary if you can meet your targets through food. They are useful for convenience — a whey protein shake post-ride when appetite is suppressed, or casein before bed for overnight muscle protein synthesis. Food first, supplements to fill gaps.

Is plant protein as effective as animal protein?

Plant proteins are generally lower in leucine and have lower digestibility. However, combining sources (rice + pea protein, legumes + grains) and eating 10-20% more total protein compensates for this. Well-planned plant-based diets support endurance training demands.

Does protein intake matter for weight loss?

Higher protein intake (1.6-2.2 g/kg) during caloric restriction preserves lean mass, increases satiety, and has a higher thermic effect (more calories burned digesting it). It is the most important macronutrient to protect during a deficit.

Can you eat too much protein?

For healthy adults with normal kidney function, protein intakes up to 2.5 g/kg/day have no demonstrated adverse effects. Above 2.2 g/kg offers no additional muscle synthesis benefit — the excess is oxidised for energy or excreted.

What about protein timing around rides?

Pre-ride: 20-30 g protein 2-3 hours before. During rides: not necessary for efforts under 3 hours. Post-ride: 20-30 g within 2 hours. The total daily intake matters more than precise timing, but post-ride protein accelerates recovery when training load is high.

Does protein intake need to increase with age?

Yes. Anabolic resistance — reduced muscle protein synthesis response per gram of protein — means older adults need more protein per meal (0.4 g/kg vs 0.3 g/kg) and more daily total (1.6-2.2 g/kg vs 1.2-1.6 g/kg) to achieve the same anabolic effect.