Question

energy expenditure
when you exercise or perform work - related physical tasks, your body burns fuel, primarily carbohydrates and fats, to provide the energy needed. the burning of these fuels is called energy expenditure. to maintain a healthy body composition, you must balance the amount of calories consumed in your diet to the number of calories burned through your normal metabolism and physical activity. the amount of energy expended during physical activity is primarily dependent on the type, frequency, intensity, and duration of the activity being performed.
activities that activate the greatest amount of muscle mass burn the most calories. at relatively equal intensities, running and cross - country skiing will burn more calories than cycling because the first two activities work both the upper and lower part of the body. the more frequently you train, the harder you train, and longer you train, the more calories you will burn.
there’s no “one size fits all” regimen
there is no aerobic fitness routine that fits everyone’s needs perfectly. it’s very important for each person to balance the types of activities they select based on their skill, physical fitness, interests, goals, and injury risk. for long - term cardio respiratory health, it’s important to select a variety of activities that you enjoy, will stick with, and that can be incorporated into a weekly routine that will meet the general quantity and quality guidelines needed to gain the health and fitness benefits associated with physical activity.
“about cardio exercise.” department of homeland security, 24 oct. 2019, www.dhs.gov/employee - resources/about - cardio - exercise.
in the space below, summarize what you learned from this reading:

Explanation:

The summary distills the two core sections: first, energy expenditure is the burning of carbs/fats for energy during activity, tied to activity type, frequency, intensity, duration, and muscle mass used (full-body activities burn more calories, and more frequent/harder/longer training increases calorie burn, with diet needing to balance calorie intake and expenditure for healthy body composition). Second, there is no universal aerobic fitness regimen; individuals must choose varied, enjoyable activities aligned with their skill, fitness level, interests, goals, and injury risk to maintain long-term cardiorespiratory health and stick to a sustainable routine.

Answer:

1. Energy Expenditure: When the body does physical activity, it burns carbohydrates and fats for energy (called energy expenditure). To keep a healthy body composition, calorie intake from diet must balance calories burned via metabolism and activity. Calories burned depend on the activity's type, frequency, intensity, duration, and muscle mass engaged; full-body activities like running or cross-country skiing burn more than cycling at similar intensity, and more frequent, intense, or longer training increases calorie burn.
2. Fitness Regimens: No single aerobic routine works for everyone. People should choose a variety of enjoyable, sustainable activities that fit their skill, fitness level, interests, goals, and injury risk to support long-term cardiorespiratory health and meet physical activity guidelines.