12 Explain the energy balance equation for maintaining a healthy weight. - Edexcel - GCSE Physical Education - Question 12 - 2019 - Paper 1

The energy balance equation is fundamental for maintaining a healthy weight. It states that the amount of energy consumed through food and beverages should equal the amount of energy expended through metabolic processes and physical activity.

When energy intake matches energy expenditure, an individual maintains their current weight. In contrast, if more energy is consumed than expended, the excess energy is stored as fat, leading to weight gain and potentially overweight or obesity. Conversely, if energy expenditure exceeds energy intake, the body will tap into stored fat for energy, which can result in weight loss and possibly underweight.

In summary, the key elements of the energy balance equation are:

1. Energy In (from food) = Energy Out (from metabolism and activities)
2. Imbalances in this equation lead to weight changes.