Final answer:
The three most important considerations for an athlete who wants to gain are body weight and composition, nutrition, and adequate energy intake.
Step-by-step explanation:
The three most important considerations for an athlete who wants to gain are:
- Body weight and composition: Athletes should focus on manipulating their body weight and composition through increased energy intake and protein consumption. This is especially beneficial for sports like football and weightlifting.
- Nutrition: Athletes have different nutritional needs to support their rigorous training and competition. Consuming enough carbohydrates, fats, and proteins is crucial for optimal performance.
- Adequate energy intake: Athletes require increased energy intake to support their training and exercise. The amount of energy needed depends on the intensity, duration, and frequency of the activity.