Fuel for Strength: Nutrition for Healthy Ageing. How to Preserve and Build Muscle Through the Years

Ageing is inevitable. Muscle loss doesn’t have to be.

If you're over 40 and starting to notice that you tire more easily, feel less steady on your feet, or recover more slowly from physical activity, your muscles may be quietly telling you something.

The good news? What you eat every day can make a significant difference. This guide covers everything older adults need to know about nutrition for healthy ageing, with practical, science-backed advice you can put into practice starting today.

Why Muscle Matters More As You Age

Most people know that exercise keeps you fit. Fewer realise that muscle is one of the most important organs of healthy ageing, playing a critical role in strength, balance, independence, falls prevention, and metabolic health.

The medical term for age-related muscle loss is sarcopenia. It begins quietly around age 30 to 40, and accelerates significantly after 60.

Research estimates that adults lose roughly 3–8% of their muscle mass per decade after age 30, with the rate increasing sharply in later decades.

What's at stake when muscle declines:

• Reduced strength and physical capacity

• Higher risk of falls and fractures

• Loss of independence in daily activities

• Slower metabolism and poorer blood sugar regulation

• Longer recovery from illness, surgery, or injury

The encouraging reality is that sarcopenia is not a fixed outcome. With the right combination of exercise and nutrition, older adults can preserve existing muscle — and in many cases, build new muscle — at any age.

The Three Pillars of Strong Muscle

Maintaining muscle through the decades comes down to three factors working together:

1. Resistance exercise — the mechanical stimulus that tells your muscles to stay strong

2. Protein intake — the raw material your muscles need to repair and grow

3. Adequate calories — the energy foundation that makes everything else work

Remove any one of these, and the muscle you've built starts to slip. This article focuses on the two nutritional pillars: protein and calories — because as the saying goes, you can't out-exercise poor nutrition.

Pillar 1: Calories — How Much Energy Does an Older Adult Actually Need?

Before thinking about what to eat, it helps to understand how much total energy your body needs each day. Eating too little — even if you're eating "healthy" food — can accelerate muscle breakdown because your body will start using muscle tissue as a fuel source.

A simple estimate for daily calorie needs:

Bodyweight (kg) × 25 = estimated daily calories to maintain weight

This is a rough guide, not a medical prescription. On days you exercise or are more physically active, eat a little more. The goal is to avoid chronic undereating, which is common among older adults — especially older women — and quietly accelerates both muscle and bone loss.

Pillar 2: Protein — The Most Important Nutrient for Muscle in Older Adults

If there is one dietary change that makes the biggest difference for seniors and older adults, it is eating enough protein — consistently, spread throughout the day.

Why Protein Matters More as You Age: Anabolic Resistance

Here's something many people don't realise: the same amount of protein builds less muscle in a 70-year-old than it does in a 30-year-old. This phenomenon is called anabolic resistance — ageing muscle becomes less sensitive to protein's muscle-building signal, requiring a higher dose to trigger the same response.

This means older adults need to:

• Eat more total protein than standard guidelines suggest

• Distribute protein across all meals, not just at dinner

• Pay particular attention to breakfast, where most older adults fall significantly short

How Much Protein Should Older Adults Eat?

Standard dietary guidelines often recommend 0.8 g of protein per kilogram of body weight per day. For healthy adults over 60, sports nutrition and clinical guidelines from bodies like ACSM, NSCA, and ESPEN now recommend considerably more:

Bodyweight (kg) × 1.2–1.6 g = daily protein target

Research suggests that aiming for 25–30 g of protein per meal is the most effective strategy for overcoming anabolic resistance. Not saving most of your protein for one large dinner.

What Does Protein Look Like on a Singapore Plate?

One of the most common barriers to eating enough protein is simply not knowing how much is in everyday foods. Here's a practical guide using foods commonly found on Singapore tables:

The good news for older adults eating local food: chicken rice, steamed fish with tofu, and egg-based breakfasts are all excellent protein sources — you just need to make sure portions are adequate and spread across the day.

What a High-Protein Day Actually Looks Like

Here's a realistic day of eating for a 70 kg older adult aiming for approximately 2,000 kcal and 100 g of protein — using everyday Singapore meals:

Breakfast — 22 g protein

2 eggs, wholemeal toast, soy milk

Lunch — 30 g protein

Chicken rice (skinless), extra vegetables

Dinner — 33 g protein

Steamed fish, tofu, rice, leafy greens

Snack — 18 g protein

Greek yogurt, teh C kosong (no sugar)

Day total: 103 g protein — target reached, spread across the day.

This is achievable with ordinary hawker and home meals. The key differences from a typical older adult's diet are: more protein at breakfast, adequate portions of lean meat or fish at main meals, and a protein-rich snack rather than a sugary one.

Portion Guide: The Palm Method

No kitchen scale? No problem. Your own hand is a surprisingly accurate portion guide — and it scales automatically with your body size.

• Protein — 1 palm-sized portion (about 150g chicken or fish)

• Fat — 1 thumb-sized portion (oils, nuts, avocado)

• Vegetables — 1 fist (raw or cooked)

• Carbohydrates — 1 cupped hand (rice, noodles, bread)

Using the palm method consistently — especially for protein — removes the guesswork and makes it easier to hit your daily targets without obsessive tracking.

Free Tools to Track Your Nutrition

If you'd like a clearer picture of what you're actually eating, these free tools are worth exploring:

• Healthy 365 (HPB Singapore) — Localised food database with Singapore-specific dishes, barcode scanning, and step tracking. Well-suited for Singapore older adults.

• MyFitnessPal — Large international food database with barcode scanning; good for packaged foods.

• Cronometer — More detailed nutrient breakdowns for those interested in micronutrients beyond just protein and calories.

What to look for when tracking:

• Calories: Are you meeting your bodyweight × 25 target?

• Protein: Are you hitting 1.2–1.6 g/kg? Is it spread across meals?

• Carbohydrates: Enough to fuel daily activity

• Fat: Present, and from quality sources (fish, tofu, nuts, olive oil)

Key Takeaways: Nutrition for Healthy Ageing

Muscle loss is not an inevitable part of growing older. The evidence is clear: adults who eat adequate protein, consume enough calories, and stay physically active preserve significantly more muscle and function into their later decades.

Here's what to remember:

1. Muscle loss begins at 40 and accelerates after 60 but is not inevitable

2. Resistance training and protein work together, and you need both

3. Aim for 1.2–1.6 g of protein per kilogram of body weight daily

4. Eat protein at every meal i.e. 25–30 g per sitting and not just at dinner

5. Eat enough total calories: bodyweight × 25 kcal is a practical starting point

6. Use the palm method for portions if counting feels overwhelming

7. Singapore hawker food can be high-protein! Chicken, fish, tofu, and eggs are excellent sources

Strong muscles support independent living. And independent living starts on the plate.

When to Seek Professional Advice

This article provides general health education from a physiotherapist's perspective. It is not a substitute for individual dietary assessment. If you have specific health conditions — such as kidney disease, diabetes, heart disease, or significant unintended weight loss — your protein and calorie targets may need to be adjusted. Please consult an accredited dietitian or your doctor for a personalised nutrition plan.

Sources: ACSM · NSCA · ESPEN protein guidance (1.2–1.6 g/kg) · Health Promotion Board Singapore — My Healthy Plate & Healthy 365

Kylie Siu is a physiotherapist at Thrive Healthcare, specialising in musculoskeletal rehabilitation and healthy ageing. For appointments or enquiries, drop us a message or visit thrivehealthcare.com.sg.

Tags: nutrition for healthy ageing, diet for elderly, protein for older adults, sarcopenia diet, muscle loss prevention, senior nutrition Singapore, healthy ageing Singapore, protein intake elderly, diet for seniors, physiotherapy Singapore