I’m trying to lose weight. Will exercising make me hungrier and eat more?

Many people claim that exercising leaves them feeling hungrier and leads them to consume more calories. However, the science behind this claim is not as straightforward as it seems. After a single workout, appetite may be suppressed, but this effect typically wears off after 30-90 minutes. Regular exercise may lead to a modest increase in hunger levels when fasting, but it does not substantially increase average daily energy intake.

The intensity of exercise can have an impact on appetite suppression. High-intensity interval training and moderate-intensity continuous exercise both temporarily suppress appetite. However, these differences are not consistent across all studies. Ultimately, the key is to choose physical activities that you enjoy and can realistically maintain, as enjoyment is crucial for long-term adherence to an exercise routine.

Weight loss goals may require more exercise than what is recommended for general health. For weight loss, around 60 minutes of moderate-intensity activity per day may be necessary. However, the relationship between exercise and hunger is complex and involves multiple factors.

Feeling ravenous after exercising may not necessarily be a result of exercise "switching on" your appetite. Several factors can be at play simultaneously. Physiologically, if you've expended a significant amount of energy, your body may eventually signal hunger as it works to restore energy balance. The more energy you expend, the more likely genuine hunger will appear later.

Psychological and behavioral factors also come into play. People may perceive exercise as an opportunity to reward themselves with additional food. Thirst and hunger can sometimes be difficult to distinguish, especially if you've exercised while dehydrated.

While post-exercise hunger shouldn't be feared, it shouldn't be automatically interpreted as an "earned" license to indulge in a super-sized meal. To manage post-exercise hunger and maintain weight loss goals, several strategies can be employed. First, hydrate with water after exercise, particularly if you've been sweating heavily or exercising in hot conditions.

Next, determine whether your hunger is genuine or if you're seeking a reward. True hunger manifests gradually with physical cues such as a rumbling stomach, low energy, headache, light-headedness, and difficulty concentrating. If you're genuinely hungry, eat a filling, nutrient-rich snack containing protein, fibre, and healthy fats.

Examples include nuts, Greek or natural yogurt with berries, fruit with nuts, wholegrain toast with avocado or cottage cheese, boiled eggs with wholegrain toast, or milk. These foods can help keep you satisfied until your next meal.