Health indicators are connected.

They work together.

Treating training and nutrition separately while forgetting rest makes progress harder.

If your goal is weight loss, coordinate nutrition and training to support performance.

What exercise works best for weight loss?

If you want to lose fat, remember that very intense exercise uses a greater share of glucose relative to fat. The fuel used during a session does not alone determine long-term fat loss.

HIIT and indoor cycling at high intensity and heart rate can improve fitness adaptations. They are options, rather than universally the best or worst route to weight loss.

These sessions use calories and draw heavily on glycogen stores rather than predominantly stored fat during the activity.

Depleted stores can leave you hungry afterwards. Refuelling matters: training is not complete until recovery needs are addressed.

However, for a fat-loss goal, compensating for every hard session by eating substantially more than needed may undermine progress.

A weight-management programme can combine strength training and cardio. Strength work supports muscle mass, influencing resting expenditure, while cardiovascular activity helps reduce inactivity and supports healthy weight management and fitness.

For weight loss, also look after nutrition. An appropriate calorie deficit should reflect your needs, ideally with professional guidance.

Nutrition’s role in training

Your diet supports progress towards sporting goals, as well as health, fitness, rest and mood.

Plan nutrition around your sessions and goals.

Adequate energy, protein and micronutrients depend on sport, intensity, duration and training goal. Fewer calories are not always better.

Sometimes cutting carbohydrate is unhelpful. Pasta may suit a situation better than gazpacho, a burger better than vegetable stew, or cereal porridge better than nuts.

Understand what happens during training. When exercise intensity is very high, carbohydrate supplies much of the energy.

At very low intensity, a greater share comes from fat.

Both situations require the nutrients needed for performance.

How can you assess fuel use during exercise?

Modern technology helps nutritionists estimate carbohydrate and fat use. Protein use is more complex to assess and is not directly established by routine breath measurements alone.

Interesting, right?

Here are assessment methods used by sports nutritionists to explore energy expenditure.

Fat Max test

A Fat Max test estimates the intensity at which fat oxidation is highest, potentially informing exercise planning.

What does that mean?

Fat Max refers to the exercise intensity producing the highest fat oxidation rate.

Gas-exchange assessment uses the respiratory ratio between oxygen uptake and carbon dioxide output.

The athlete is monitored through stages beginning at low intensity and increasing every 3 minutes.

Energy substrate test

An energy substrate test explores fuel use, including carbohydrate from glycogen and fat. The role of protein requires additional assumptions or measurements.

This helps assess energy and nutrient needs during training or competition, allowing a more individual nutrition plan.

Basal metabolic rate test

For weight and fat loss goals, knowing the energy used at rest can help. This can be assessed through a basal metabolic rate test.

To estimate total daily expenditure, combine basal metabolic rate with daily activity, or NEAT, and exercise expenditure, alongside the energy cost of processing food.

These data help plan an appropriate calorie deficit for weight loss.

Coordinating training and nutrition

Adapt nutrition to your sport, including the physical capacity being trained and practical demands.

For example:

In martial arts, weight-category management.
In contact and team sports, recovering from impact and inflammation to help reduce injury risk.
In strength sports, supporting muscle gain.
In endurance sports, appropriate body composition and sustaining the required pace.

Alongside physiological needs and sporting logistics, account for everyday life.

That means your preferences, cooking skills and time, intolerances, dietary values, medical conditions, family commitments, stress, rest and habits; where you shop; access to a microwave; and whether weekday meals must be easy to carry.