ISSA NutrItIoN CertIfICAtIoN exAm Study GuIde
2026 | Complete prACtICe teSt BANk wIth VerIfIed
ANSwerS & detAIled rAtIoNAleS | INterNAtIoNAl
SportS SCIeNCeS ASSoCIAtIoN SportS NutrItIoN
SpeCIAlISt reVIew | mACroS, metABolISm,
SupplemeNtS, weIGht mANAGemeNt & ClIeNt
CoAChING SCeNArIoS
ISSA NUTRITION CERTIFICATION EXAM
Question 1: Which macronutrient provides the most calories per gram?
A) Protein
B) Carbohydrates
C) Fats
D) Fiber
Correct Answer: C
Rationale: Fats provide 9 calories per gram, which is more than double the calories provided by
protein and carbohydrates (4 calories per gram each). This is why fats are considered the most
calorie-dense macronutrient and play a crucial role in energy storage and hormone production.
Question 2: What is the recommended daily protein intake for strength-training athletes per
kilogram of body weight?
A) 0.8-1.0g/kg
B) 1.6-2.2g/kg
C) 3.0-4.0g/kg
D) 0.5-0.7g/kg
Correct Answer: B
Rationale: Strength-training athletes require 1.6-2.2g of protein per kg of body weight to
support muscle protein synthesis, recovery, and adaptation. This is significantly higher than the
RDA for sedentary individuals (0.8g/kg) due to increased training demands and muscle building
requirements.
Question 3: Which vitamin is primarily responsible for calcium absorption in the intestines?
, A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin K
Correct Answer: C
Rationale: Vitamin D (specifically calcitriol, the active form) is essential for calcium absorption
in the small intestine. It increases the production of calcium-binding proteins that facilitate
calcium transport across the intestinal wall, making it crucial for bone health and preventing
deficiency-related disorders.
Question 4: What is the primary fuel source during high-intensity exercise lasting 1-3
minutes?
A) Aerobic glycolysis
B) Anaerobic glycolysis
C) Fat oxidation
D) Phosphocreatine system
Correct Answer: B
Rationale: During high-intensity exercise lasting 1-3 minutes, anaerobic glycolysis is the
dominant energy system. This system rapidly breaks down glucose/glycogen without oxygen to
produce ATP, though it also produces lactate as a byproduct. The phosphocreatine system only
lasts 10-15 seconds, while fat oxidation requires oxygen and is too slow for high-intensity
efforts.
Question 5: Which of the following is considered an essential fatty acid?
A) Oleic acid
B) Linoleic acid
C) Palmitic acid
D) Stearic acid
Correct Answer: B
Rationale: Linoleic acid is an omega-6 essential fatty acid that cannot be synthesized by the
human body and must be obtained from the diet. Essential fatty acids are crucial for cell
membrane structure, hormone production, and inflammatory response regulation. Alpha-
linolenic acid (omega-3) is the other essential fatty acid.
2026 | Complete prACtICe teSt BANk wIth VerIfIed
ANSwerS & detAIled rAtIoNAleS | INterNAtIoNAl
SportS SCIeNCeS ASSoCIAtIoN SportS NutrItIoN
SpeCIAlISt reVIew | mACroS, metABolISm,
SupplemeNtS, weIGht mANAGemeNt & ClIeNt
CoAChING SCeNArIoS
ISSA NUTRITION CERTIFICATION EXAM
Question 1: Which macronutrient provides the most calories per gram?
A) Protein
B) Carbohydrates
C) Fats
D) Fiber
Correct Answer: C
Rationale: Fats provide 9 calories per gram, which is more than double the calories provided by
protein and carbohydrates (4 calories per gram each). This is why fats are considered the most
calorie-dense macronutrient and play a crucial role in energy storage and hormone production.
Question 2: What is the recommended daily protein intake for strength-training athletes per
kilogram of body weight?
A) 0.8-1.0g/kg
B) 1.6-2.2g/kg
C) 3.0-4.0g/kg
D) 0.5-0.7g/kg
Correct Answer: B
Rationale: Strength-training athletes require 1.6-2.2g of protein per kg of body weight to
support muscle protein synthesis, recovery, and adaptation. This is significantly higher than the
RDA for sedentary individuals (0.8g/kg) due to increased training demands and muscle building
requirements.
Question 3: Which vitamin is primarily responsible for calcium absorption in the intestines?
, A) Vitamin A
B) Vitamin C
C) Vitamin D
D) Vitamin K
Correct Answer: C
Rationale: Vitamin D (specifically calcitriol, the active form) is essential for calcium absorption
in the small intestine. It increases the production of calcium-binding proteins that facilitate
calcium transport across the intestinal wall, making it crucial for bone health and preventing
deficiency-related disorders.
Question 4: What is the primary fuel source during high-intensity exercise lasting 1-3
minutes?
A) Aerobic glycolysis
B) Anaerobic glycolysis
C) Fat oxidation
D) Phosphocreatine system
Correct Answer: B
Rationale: During high-intensity exercise lasting 1-3 minutes, anaerobic glycolysis is the
dominant energy system. This system rapidly breaks down glucose/glycogen without oxygen to
produce ATP, though it also produces lactate as a byproduct. The phosphocreatine system only
lasts 10-15 seconds, while fat oxidation requires oxygen and is too slow for high-intensity
efforts.
Question 5: Which of the following is considered an essential fatty acid?
A) Oleic acid
B) Linoleic acid
C) Palmitic acid
D) Stearic acid
Correct Answer: B
Rationale: Linoleic acid is an omega-6 essential fatty acid that cannot be synthesized by the
human body and must be obtained from the diet. Essential fatty acids are crucial for cell
membrane structure, hormone production, and inflammatory response regulation. Alpha-
linolenic acid (omega-3) is the other essential fatty acid.
