Master endurance athlete nutrition with science-backed guidance on carbohydrates, protein, hydration, timing, and fueling strategies for peak performance.
Frequently Asked Questions
What should endurance athletes eat every day?
Endurance athletes need high carbohydrate intakes (5–10 g/kg/day depending on training load), adequate protein (1.6–1.8 g/kg/day), and at least 20–35% of calories from healthy fats. Whole grains, lean proteins, fruits, vegetables, and quality fats form the daily foundation.
How many carbs do endurance athletes need?
Carb needs scale with training volume: 5–7 g/kg/day for moderate training (1 hour/day), 6–10 g/kg/day for hard training (1–3 hours/day), and 8–12 g/kg/day for very high-volume training (4+ hours/day). For a 70 kg athlete, that is 350–840 grams of carbohydrate daily.
Do endurance athletes need more protein than strength athletes?
Slightly less, but more than most people think. Endurance athletes need 1.6–1.8 g/kg/day (versus up to 2.2 g/kg for strength athletes). Recent 2025 research in Sports Medicine found that most endurance athletes habitually consume only ~1.5 g/kg/day — below the optimal threshold.
What is carbohydrate loading and does it work?
Carbohydrate loading means elevating carb intake to 10–12 g/kg/day for 1–3 days before an endurance event lasting more than 90 minutes. It works by maximizing glycogen stores in muscles and the liver, delaying the fatigue that comes with glycogen depletion. Research consistently supports its effectiveness for events over 90 minutes.
What are the best supplements for endurance athletes?
The strongest evidence supports caffeine (3–6 mg/kg, 30–90 min pre-exercise), dietary nitrates from beetroot juice (300–600 mg, 90 min pre-exercise), and electrolyte replacement during prolonged effort. Antioxidants like tart cherry juice can support post-exercise recovery when used strategically.