Crossfit Nutrition & Performance Optimization 3 — Questions and Answers
Question 1: When should an athlete consume carbohydrates for optimal glycogen resynthesis after a CrossFit WOD?
- Only before sleep
- Within 30–60 minutes post-workout (Correct answer)
- 48 hours after training
- Only during the workout itself
Correct answer: Within 30–60 minutes post-workout
The 30–60 minute post-exercise window offers the highest rate of glycogen resynthesis due to elevated GLUT4 transporter activity.
Question 2: Which fat type should CrossFit athletes prioritize to support anti-inflammatory recovery?
- Trans fats
- Omega-6 polyunsaturated fats exclusively
- Omega-3 polyunsaturated fats (Correct answer)
- Partially hydrogenated oils
Correct answer: Omega-3 polyunsaturated fats
Omega-3 fatty acids (found in fatty fish, flaxseed, walnuts) have anti-inflammatory properties that support recovery from intense training.
Question 3: A 150 lb CrossFit athlete training twice per day wants to estimate daily caloric needs. Which factor is MOST important to apply to a base metabolic rate calculation?
- Body fat percentage only
- An activity multiplier reflecting training volume and intensity (Correct answer)
- Resting heart rate
- Sleep duration
Correct answer: An activity multiplier reflecting training volume and intensity
Total daily energy expenditure is calculated by multiplying BMR by an activity factor that accounts for training frequency and intensity.
Question 4: What is the primary role of magnesium in athletic performance relevant to CrossFit?
- Carbohydrate storage
- Muscle contraction, protein synthesis, and energy metabolism (Correct answer)
- Fat digestion
- Oxygen transport in the blood
Correct answer: Muscle contraction, protein synthesis, and energy metabolism
Magnesium supports muscle contraction, protein synthesis, and ATP-based energy production, all critical to CrossFit performance.
Question 5: A CrossFit trainer notices an athlete is consuming very high protein (3+ g/lb/day) while restricting carbohydrates severely. What is the most likely performance consequence?
- Improved power output due to excess amino acids
- Gluconeogenesis from protein may partially compensate, but glycolytic performance will still suffer (Correct answer)
- No effect — protein fully replaces carbohydrates for high-intensity work
- Enhanced fat burning that improves WOD times
Correct answer: Gluconeogenesis from protein may partially compensate, but glycolytic performance will still suffer
Although gluconeogenesis can produce some glucose from amino acids, it cannot supply glycolytic fuel fast enough to sustain high-intensity CrossFit output.
Question 6: Which dietary approach does CrossFit most commonly reference as a foundational nutrition template for its athletes?
- Vegan diet
- Eat meat and vegetables, nuts and seeds, some fruit, little starch, no sugar (Correct answer)
- High-grain Mediterranean diet
- Liquid meal replacement protocols
Correct answer: Eat meat and vegetables, nuts and seeds, some fruit, little starch, no sugar
CrossFit's foundational nutrition prescription is: eat meat and vegetables, nuts and seeds, some fruit, little starch, and no sugar.
Question 7: Why is fiber consumption important for CrossFit athletes despite not being directly oxidized for energy?
- Fiber converts directly to glycogen during digestion
- Fiber supports gut health, stabilizes blood glucose, and promotes satiety (Correct answer)
- Fiber increases cortisol production
- Fiber replaces the need for electrolytes
Correct answer: Fiber supports gut health, stabilizes blood glucose, and promotes satiety
Dietary fiber supports a healthy gut microbiome, moderates blood glucose spikes, and helps athletes manage hunger and energy levels.
Crossfit Nutrition & Performance Optimization 3
When should an athlete consume carbohydrates for optimal glycogen resynthesis after a CrossFit WOD?