The relationship between diet and exercise

The importance of diet and nutrition

The food we eat provides the fuel our bodies need to function optimally. A balanced diet rich in fruits, vegetables, whole grains, and protein offers a variety of essential nutrients, including:

• Macronutrients: Carbohydrates, protein, and fats provide energy for everyday activities and exercise.

• Micronutrients: Vitamins and minerals are crucial for various bodily processes, such as immune function, hormone regulation, and cell repair.

More than 800,000 patients were admitted to hospitals with malnutrition and nutritional deficiencies in 2022. A healthy diet helps address these deficiencies and supports overall health and well-being.

The benefits of exercise and physical activity

Regular physical activity offers a multitude of benefits, both physical and mental. Some key advantages include:

Weight management

Exercise helps burn calories and can contribute to weight loss or maintenance. Regular physical activity, particularly high-intensity exercise and strength training, can elevate your metabolic rate, even at rest. This means you burn more calories throughout the day, even when you're not actively exercising.

Reduced risk of chronic diseases

According to the NHS, people who exercise regularly have a lower risk of developing many long-term (chronic) conditions, such as heart disease, type 2 diabetes, stroke, and some cancers.

Improved mood and mental well-being

There is a wide range of research that supports the impacts of physical activity on mental health. Exercise releases endorphins, which have mood-boosting effects and can help combat stress and anxiety. Exercising can also enhance your self-esteem and ultimately give you a better frame of mind.

Are diet and exercise equally important for losing weight?

It is often debated whether diet or exercise is more important. Research has found that in the longer term, weight loss is increased when diet and physical activity are combined. A further systematic review states that the most efficient regimen for obesity is to combine strength and endurance exercise with a low-calorie diet. 

Why Balancing Diet and Exercise is the Best Method

A balanced approach to diet and exercise offers the most significant and sustainable benefits for weight management and overall health. Here's why:

• Synergy for weight loss: A diet creates a calorie deficit, while exercise boosts calorie expenditure. Combining both leads to more effective weight loss.

• Muscle building and maintenance: Exercise, particularly strength training, promotes muscle growth. Muscle is metabolically active tissue, meaning it burns calories even at rest. A good diet provides the protein needed to build and maintain muscle mass, further aiding weight management.

• Improved energy levels: Eating a balanced diet provides sustained energy throughout the day, allowing you to perform better during workouts.

• Long-term health benefits: Combining a healthy diet with regular exercise reduces the risk of chronic diseases and promotes overall well-being.

Common misconceptions about diet and exercise

Some common myths about diet and exercise are:

• ‘If I take a weight loss medication I don’t have to diet or exercise.’ Weight loss medications can help you in your journey to weight loss, but it is only when you use a combination of diet and exercise that you’ll see the best results.

• ‘Spot reduction is possible.’ You can't target fat loss in specific areas through exercise alone.

• ‘All calories are created equal.’ The quality of your calories matters. Processed foods and sugary drinks are high in calories but offer minimal nutrients, while whole foods provide essential nutrients alongside calories.

• ‘No pain, no gain.’ While challenging yourself is important, pushing yourself to the point of pain can lead to injury. Listen to your body and gradually increase intensity.

FAQs

How much exercise do I need?

According to the NHS, adults should aim to do at least 150 minutes of moderate-intensity activity a week or 75 minutes of vigorous-intensity activity a week. Physical activity can be spread out through the week, for example, 30 minutes of moderate-intensity exercise five times a week. 

What if diet and exercise aren’t helping me lose enough weight?

If you're struggling to reach your weight loss goals through diet and exercise alone, you may want to explore other weight management options. You can consult with your doctor to see what extra support is available, such as those provided by NHS Better Health, and if alternative methods may be suitable for you. You can also explore other services, such as our Online Doctor, which can be an option for people who have been unsuccessful in losing weight with a reduced calorie diet and exercise regime and have a BMI over 30 or 27 with an underlying weight related health condition, although these are not the only criteria a clinician will consider. 

If you, or someone you know, has a BMI lower than 25 and is trying to lose weight, they may have an eating disorder. Please see this article on supporting someone with an eating disorder for more advice.