No. Most suggestions start with : what do you weigh? How much fat are you carrying? How much do you need to use? What's your food and calorie intake like? Age barely counts
counting calories only works in the short run. if you ate in a calorie deficit everyday and lost 1 pound a week after 200 weeks you would weigh 0 right?
don't confuse what competitors do with what actually works. it isn't about calories in and out.. it is about what you eat and when you eat.