How Much Protein Do You Need After 40? A Guide for Endurance Athletes

When it comes to endurance training, most middle-aged athletes pay close attention to mileage, gear, and recovery routines. But what about nutrition? More specifically — what about protein?

For men (and women) over 40, protein isn’t just about building muscle. It plays a vital role in performance, recovery, and long-term health. If you're hitting the training sessions hard but not giving your body the right fuel, especially protein, you're not getting the full return on your effort.

Why Protein Matters More After 40

As we age, our bodies naturally begin to lose muscle mass — a process called sarcopenia. Starting as early as your 30s, this muscle loss accelerates if not countered with proper training and nutrition. For endurance athletes over 40, the stakes are even higher.

Here’s why protein is so important for you now:

• Preserves muscle mass
• Speeds up recovery after tough training sessions
• Supports metabolic health and fat loss
• Strengthens the immune system
• Helps with focus and mood regulation

Without enough protein, your body can struggle to recover, your performance can plateau, and you’re more prone to injury and fatigue.

How Much Protein Do You Need?

Current guidelines suggest that active adults over 40 may need anywhere from 1.2–2.0g of protein per kg of bodyweight per day, depending on training intensity. That’s significantly more than the 0.8g/kg minimum recommended for the general population.

For example, a 75kg male training regularly should aim for 90–150g of protein daily.

And it’s not just the amount — timing matters too. Protein should be spread throughout the day, with particular attention to post-training and pre-bedtime intake to optimise muscle repair and growth.

Best Sources of Protein

Not all proteins are created equal. Here’s how the top sources stack up:

Animal-Based Proteins (Complete Proteins)

• Chicken, turkey, beef – High-quality, complete proteins rich in B vitamins and iron.
• Fish (salmon, tuna, mackerel) – Great for protein plus omega-3s for heart and joint health.
• Eggs – One of the most bioavailable protein sources
• Greek yoghurt, cottage cheese – Packed with protein and gut-friendly probiotics.
• Whey protein – Fast-absorbing and ideal post-workout.

Plant-Based Proteins (Some Incomplete)

• Lentils, chickpeas, black beans – Excellent for fibre and slow-digesting carbs.
• Tofu, tempeh, edamame – Soy-based and complete proteins.
• Quinoa – A rare complete grain-based protein.
• Nuts and seeds – Good as snacks but lower in protein by volume; great when paired with other sources.

Tip: If you're eating mostly plant-based, aim for a mix of sources to get all the essential amino acids.

Top Protein-Rich Foods for Endurance Athletes Over 40

Looking to upgrade your daily intake? Try adding these foods to your routine:

Smart Protein Snacks

When training volume is high or you're trying to avoid the mid-afternoon energy crash, snacks matter. Here are some high-protein, low-fuss options perfect for middle-aged athletes:

✅ Greek yoghurt with berries and honey

✅ Protein bar (watch for low sugar and artificial additives)

✅ Boiled eggs with a sprinkle of sea salt

✅ Sliced apple with peanut butter

✅ Tuna or chicken salad on whole grain crackers

✅ Edamame pods with sea salt

✅ Cottage cheese with cherry tomatoes

✅ Jerky (look for lower-sodium versions)

✅ Protein shake with a banana

The Takeaway

As you move through your 40s and beyond, protein becomes less of a bonus and more of a necessity — not just to maintain muscle, but to keep you strong, lean, and performing at your best.

Next time you’re planning your meals around your training, don’t just think carbs. Think protein, balance, and timing — your body will thank you for it.

Want to put your nutrition knowledge into action? Sign up for a DB Max event today and test your performance on the course. Your next PB might just start in the kitchen!