Whether you should aim for a calorie deficit or surplus depends on your specific goals. If you are looking to lose weight, a calorie deficit is necessary as it means you are burning more calories than you are consuming. On the other hand, if you are trying to gain muscle mass, a calorie surplus may be beneficial as it provides your body with the extra energy needed for muscle growth. It's important to find the right balance that aligns with your individual goals and overall health. **

No, it is not necessary to have a calorie surplus only on training days. While it is important to have extra calories on training days to support muscle growth and recovery, it is also important to have a balanced diet and sufficient calories on rest days to support overall health and recovery. Consistently maintaining a calorie surplus only on training days may lead to imbalances and hinder overall progress. It is important to consider overall energy expenditure and nutritional needs throughout the week, not just on training days. **

The calorie requirement for a 15-year-old athletic boy can vary depending on his level of activity and body composition. On average, a 15-year-old athletic boy may need anywhere from 2,200 to 3,000 calories per day to support his energy needs and physical activity. It is important for him to consume a balanced diet that includes a variety of nutrients to support his growth, development, and athletic performance. It is recommended for him to consult with a healthcare professional or a registered dietitian to determine his specific calorie needs based on his individual circumstances. **

For young outdoor cats, a high-calorie cat food that is suitable would be one that is specifically formulated for active and growing cats. Look for a cat food that is high in protein and fat to support their energy needs. Additionally, choose a cat food that contains essential nutrients such as omega-3 fatty acids, vitamins, and minerals to support their overall health and development. It's important to consult with a veterinarian to determine the best high-calorie cat food for your young outdoor cat based on their specific needs and activity level. **

Zero-calorie drinks can be okay for strength training as they do not contain any calories that could potentially hinder weight loss or muscle gain goals. However, it is important to note that some zero-calorie drinks may contain artificial sweeteners or other additives that could have negative effects on overall health. It is always best to opt for water as the primary source of hydration during strength training, and to consume zero-calorie drinks in moderation. **

MyFitnessPal uses calorie training to help users achieve their weight and fitness goals. When setting up the app, users input their current weight, goal weight, and activity level. Based on this information, MyFitnessPal calculates a daily calorie goal to help users reach their desired weight. Users can track their food intake and exercise, and the app adjusts their calorie goal accordingly. This helps users stay on track with their calorie intake and expenditure, making it easier to achieve their weight and fitness goals. **

A calorie surplus occurs when swimming and running when the number of calories consumed exceeds the number of calories burned during these activities. This can happen if a person consumes a large meal before or after their workout, leading to an excess of calories. Additionally, if someone overestimates the number of calories burned during their swim or run, they may end up in a surplus. It's important to be mindful of both food intake and energy expenditure to maintain a healthy balance. **

Switching between a calorie surplus and calorie deficit involves adjusting your daily calorie intake and expenditure. To switch to a calorie surplus, you would increase your calorie intake by consuming more food, particularly focusing on nutrient-dense, high-calorie foods. This can be combined with a decrease in physical activity to minimize calorie expenditure. To switch to a calorie deficit, you would reduce your calorie intake by consuming fewer calories, while also increasing physical activity to burn more calories. It's important to make gradual changes and monitor your progress to ensure a healthy and sustainable transition between the two states. **