ACE Nutrition & Weight Management 2 — Questions and Answers
Question 1: What caloric deficit is generally recommended to produce approximately 1 pound (0.45 kg) of fat loss per week?
- 1,500 kcal/week
- 3,500 kcal/week (Correct answer)
- 5,000 kcal/week
- 7,000 kcal/week
Correct answer: 3,500 kcal/week
One pound of body fat contains approximately 3,500 kcal, so a deficit of 500 kcal/day (3,500 kcal/week) theoretically produces 1 lb of fat loss per week.
Question 2: Which of the following is a limitation of Body Mass Index (BMI) as a measure of health risk?
- It requires expensive lab equipment to calculate
- It does not differentiate between fat mass and lean mass (Correct answer)
- It is only valid for individuals over age 40
- It underestimates risk in underweight individuals
Correct answer: It does not differentiate between fat mass and lean mass
BMI uses only height and weight, so it cannot distinguish between body fat and muscle mass, potentially misclassifying muscular individuals as overweight.
Question 3: What is the minimum daily caloric intake generally recommended for women to avoid nutrient deficiencies during a weight-loss program?
- 800 kcal
- 1,200 kcal (Correct answer)
- 1,500 kcal
- 1,800 kcal
Correct answer: 1,200 kcal
Most guidelines recommend women consume no fewer than 1,200 kcal/day to obtain adequate micronutrients; lower intakes risk deficiencies and metabolic adaptation.
Question 4: Which hormone, produced by adipose tissue, signals satiety to the hypothalamus and helps regulate long-term energy balance?
- Ghrelin
- Insulin
- Leptin (Correct answer)
- Cortisol
Correct answer: Leptin
Leptin is released by fat cells and acts on the hypothalamus to suppress appetite and increase energy expenditure, regulating long-term energy balance.
Question 5: Metabolic syndrome is diagnosed when a client has at least three of five risk factors including abdominal obesity, elevated triglycerides, low HDL, elevated blood pressure, and which fifth criterion?
- Elevated LDL cholesterol
- Elevated fasting blood glucose (Correct answer)
- Elevated uric acid levels
- Reduced VO2max
Correct answer: Elevated fasting blood glucose
The five criteria for metabolic syndrome include elevated fasting blood glucose (≥100 mg/dL), abdominal obesity, high triglycerides, low HDL, and high blood pressure.
Question 6: What physiological mechanism primarily explains why 'yo-yo' dieting often leads to increased body fat percentage over time?
- Repeated dieting permanently damages the gut microbiome
- Caloric restriction causes loss of lean mass, lowering resting metabolic rate (Correct answer)
- Fat cells increase in number with each dieting cycle
- Hormones permanently increase hunger during caloric restriction
Correct answer: Caloric restriction causes loss of lean mass, lowering resting metabolic rate
Severe caloric restriction causes loss of lean muscle mass, which lowers resting metabolic rate and makes subsequent weight regain (mostly as fat) more likely.
Question 7: According to the ACE scope of practice, which of the following is an appropriate nutrition-related action for a personal trainer?
- Creating individualized meal plans with specific caloric targets
- Prescribing supplements to address diagnosed nutrient deficiencies
- Sharing general government dietary guidelines such as MyPlate (Correct answer)
- Providing medical nutrition therapy for a client with Type 1 diabetes
Correct answer: Sharing general government dietary guidelines such as MyPlate
Personal trainers may share general, publicly available dietary guidelines (e.g., MyPlate, Dietary Guidelines for Americans) but must not provide individualized medical nutrition therapy.
ACE Nutrition & Weight Management 2
What caloric deficit is generally recommended to produce approximately 1 pound (0.45 kg) of fat loss per week?